Free pre-calculus mathematics homework help from qualified mentors. Math courses prior to calculus homework. Please use the template when requesting help and show your work.
Threads
Proving Sin x + Sin 2x + Cos x + Cos 2x = 2√2cos(x/2)sin(3x/2+π/4)
- stfz
- · Replies 2 ·
Solve AM GM HM Inequality for a+b+c=0
- erisedk
- · Replies 2 ·
Solve Quadratic Equations: Find |a-b| for n=a,b
- erisedk
- · Replies 1 ·
Finding z in complex equations and square roots of 3+4i
- teetar
- · Replies 2 ·
Finding the constraint on a and c when ax² + x + c - a = 0 has imaginary roots
- erisedk
- · Replies 7 ·
Calculating backlog in quarters
- Huumah
- · Replies 4 ·
Show that cos(π/5) equals half the golden ratio
- PcumP_Ravenclaw
- · Replies 1 ·
Find Minimum Value of T^2 in Normal to Parabola y^2 = 4ax at (at^2, 2at)
- erisedk
- · Replies 3 ·
Why does adding 4.3×10⁸ and 2.5×10⁷ require showing 455?
- adjacent
- · Replies 5 ·
Proving 1/(sec∅−tan∅) ≡ sec∅+tan∅
- chwala
- · Replies 4 ·
Probability question on students
- tsukuba
- · Replies 6 ·
Probability of rolling a sum of 7 with loaded dice
- Panphobia
- · Replies 2 ·
Division vs subtraction with fractions
- t3rom
- · Replies 5 ·
Finding area of rectangle formed by roots of quartic polynomial
- erisedk
- · Replies 11 ·
How do I convert 2cis(-pi/3)cis(pi/6) into cartesian form?
- SteliosVas
- · Replies 6 ·
Find Min Distance b/w Parabolas: 7/(4*root2)
- erisedk
- · Replies 2 ·
Calculating Variance for Y=3x^2+3x+3
- hellokitten
- · Replies 3 ·
Complex numbers in trigonometry form
- LagrangeEuler
- · Replies 2 ·
Show that set {(x,y) in Z | 5x+7y divisible by 3} is symmetric
- gummz
- · Replies 1 ·
How Do You Compute Value at Risk for a Two-Year Investment with Compound Growth?
- Peter G.
- · Replies 4 ·
Finding the length and width of rectangle
- chwala
- · Replies 8 ·
Making a piecewise function continuous everywhere
- ninty45
- · Replies 5 ·
Is the Numerical Dissolution Time Calculation for a Sphere Accurate?
- henxan
- · Replies 9 ·
Proving A - (B ∩ C) = (A - B) ∪ (A - C) in Discrete Math
- pyronova
- · Replies 6 ·
Component of vector A = 2i + 3j along vector B = i + j
- Hijaz Aslam
- · Replies 3 ·
How do sine, cosine and tangent extend beyond right triangle ratios?
- physior
- · Replies 33 ·
Proving three vectors are coplanar
- FaraDazed
- · Replies 5 ·
Proving cos(cos-1(x)) Lies in [-1,1]
- SteliosVas
- · Replies 11 ·
Proving trigonometric equations
- peterspencers
- · Replies 3 ·
Angular momentum and energy conservation with rotating disk
- bobie
- · Replies 1 ·
Find an expression in terms of v in terms of p, b and a
- Natasha1
- · Replies 4 ·
Prove that if x,y, and z are integers and
- Bashyboy
- · Replies 24 ·
Sequence Limits: Difference of radicals
- Benighted
- · Replies 7 ·
Converting to Polar and Cartesian form
- SteliosVas
- · Replies 4 ·
Prove that x^n-y^n is divisible by x-y
- mxam
- · Replies 12 ·
Can You Solve Trigonometric Equations Involving Sine and Cosine?
- physior
- · Replies 7 ·
What does OR mean in trigonometric solution formulas?
- physior
- · Replies 7 ·
Why Is the Value '2' Used in Calculating Coin Variance?
- werson9339
- · Replies 1 ·
Domain of a composite function
- ilii
- · Replies 4 ·
Using the difference formula to find tan(15°)
- Charlie Prieto
- · Replies 1 ·
Find and simplify fg(x) and gf(x) for rational functions
- liamporter1702
- · Replies 11 ·
Are my equations for two player zero-sum games correct?
- Jimbrisky
- · Replies 1 ·
Finding intersection points of y=3x² and y=3^x by graphing
- ilii
- · Replies 3 ·
The graph of an exponential function given by f (x) = A(b^x)+c
- Niaboc67
- · Replies 3 ·
Find the number of bacteria after 12 hours?
- Niaboc67
- · Replies 1 ·
Number of bacteria in a culture
- Niaboc67
- · Replies 2 ·
Number of unique integer factors
- malachaipoos
- · Replies 4 ·
Minimum Distance between two curves
- ManInTheSuit97
- · Replies 2 ·
Possible Values of k for a Quadratic Inequality: 2x^2 + kx + 9 = 0
- LiHJ
- · Replies 2 ·
Cosine question. Scalar product.
- LagrangeEuler
- · Replies 3 ·
Formula of shortest distance between two skewed lines
- gxc9800
- · Replies 5 ·
Monotonically decreasing/increasing
- BOAS
- · Replies 8 ·
Is sequence 1/(n-1) necessarily bounded?
- Axel Harper
- · Replies 3 ·
Precalculus problems, don't understand
- Niaboc67
- · Replies 7 ·
Solving for X: The Logarithmic Equations
- Alykayy
- · Replies 3 ·
Limit problem involving a double factorial
- powerof
- · Replies 1 ·
Range of validity for Binomial Series
- LiHJ
- · Replies 2 ·
Solving (3x+5)^{-4}=64 from Serge Lang's Basic Mathematics
- OrigamiCaptain
- · Replies 15 ·
What are the mean and median of a die rolled 600 times?
- Mr Davis 97
- · Replies 5 ·
Verifying \vec{A} \cdot (\vec{B} x \vec{C}) = \vec{B} \cdot (\vec{C} x \vec{A})
- FaraDazed
- · Replies 4 ·
How Do You Solve for the Adjacent Side Using Cosine?
- Edobbs0916
- · Replies 2 ·
Observations, unit of analysis, and variables
- Mr Davis 97
- · Replies 4 ·
How to Approach an Induction Proof for a Product Ratio Inequality?
- Thomas Rainey
- · Replies 5 ·
Coordinate transformation parameterization
- throneoo
- · Replies 2 ·
Solving asinx + bcosx = c and choosing correct angles
- physior
- · Replies 1 ·
Functional equation problem ( edited )
- Parishrut
- · Replies 1 ·
Parametric equation to cartesian
- Mrencko
- · Replies 9 ·
Counting supplementary angle pairs and combining polygons
- FredericChopin
- · Replies 8 ·
What Direction and Distance Must the Ship Sail to Reach 125km East of Guam?
- tjackson9810
- · Replies 2 ·
Why does adding x to a quadratic shift the parabola left and down?
- JohnnyIngrim
- · Replies 11 ·
How do I solve X=e^y for y?
- Mrencko
- · Replies 14 ·
Plane in 3-space not parallel to xy- zx- or zy- plane
- Duderonimous
- · Replies 2 ·
Rearranging to give y = mx + c
- Dave_
- · Replies 2 ·
Drawing a parallelogram with side 4cm, diagonals summing to 11cm, angle 22°
- Redinorun
- · Replies 4 ·
Why Should You Learn to Think in Radians for Trigonometry?
- Ritzycat
- · Replies 15 ·
If 137 + 276 = 435, what is 731 + 672?
- ajayguhan
- · Replies 1 ·
Orthogonal and Parallel Vectors
- _N3WTON_
- · Replies 17 ·
How does skew and range affect standard deviation
- Mr Davis 97
- · Replies 2 ·
Two equations to solve simultaneously
- johann1301
- · Replies 4 ·
Finding the modulus and argument of a complex number
- Bashyboy
- · Replies 7 ·
Drawing triangles given sides and angles
- Redinorun
- · Replies 15 ·
Trig -- An airplane is ascending at an angle of 10 degrees
- Hierophant
- · Replies 4 ·
Statistics: Degeneracy and Multiplicity
- teme92
- · Replies 10 ·
Probabilities of Getting 50 Tails in 100 Coin Tosses Using Binomial Distribution
- Manel
- · Replies 12 ·
Adv. Functions: Rate of Change in Rational Functions
- harujina
- · Replies 4 ·
Why can you multiply inside modulus by i in complex loci?
- stfz
- · Replies 3 ·
Help checking my proof by induction for an algebraic sum
- woundedtiger4
- · Replies 1 ·
Inverse matrix word problem, matrix arithmetic
- IrinaK.
- · Replies 4 ·
Discontinuous/Continuous Functions
- happysmiles36
- · Replies 4 ·
Probability: having trouble with explanations
- terp.asessed
- · Replies 8 ·
What is the correct way to divide complex polynomials in two steps?
- iamjon.smith
- · Replies 7 ·
How do I know this point lies on the line in the plane?
- shreddinglicks
- · Replies 7 ·
Matrices: word problem, transition matrix
- IrinaK.
- · Replies 4 ·
Intermediate Algebra -- Maximize profit when manufacturing clothes
- BrettJimison
- · Replies 3 ·
Formula of nth term of a pattern
- songoku
- · Replies 9 ·
Complex Radical or Complex Root?
- iamjon.smith
- · Replies 6 ·
Binomial series with coeficients in arithmetic progression
- Appleton
- · Replies 2 ·
How Do You Solve for x2 in the Equation a1b1/x1 = a2b2/x2?
- iamjon.smith
- · Replies 1 ·
Examples in lin.alg. where closure/addition axioms don't hold
- gummz
- · Replies 1 ·
Prove Inequality n! > n^3 for n > 5 w/ M.I.
- Panphobia
- · Replies 12 ·