Recent content by missmerisha

That has nothing to do with the question.

Homework Statement The solutions of the equation a^3 z^3+b^3 i =0 where a,b are an element of R+ The Attempt at a Solution a^3 z^3 = - b^3 i z^3 = (-b^3 i) / (a^3) Now I'm stuck. Any other suggestions?

don't worry, I've got it. Thank you!

so it's tan ( pi/3 ) = ( x+ 1 / x)

I'm working out the arg of z in term of x tan ( y/ x) = ( x+1)/ x = pi/3

Homework Statement If z = x + ( x+1) i, find the value of x for which Arg (z) = pi/3 Homework Equations The Attempt at a Solution ( x+1/x) = pi/3 x = 3/( pi -3) Answer: ( 3) ^(1/2) + 1 divided by 2

I don't get it If the momentum is 0 then the velocity is 0

Homework Statement An arrow of mass 100 g is fired with an initial horizontal velocity of 40 m s–1 to the right at an apple of mass 80 g that is initially at rest on a horizontal surface. When the arrow strikes the apple, the two objects stick together. What is the common velocity of the...

Homework Statement State the range y=inverse tan( 2x) The Attempt at a Solution The original range of inverse tan is ( -pi/2, pi/2) Should tan inverse (2x) have (-pi, pi) as its range?

Homework Statement For a cubic polynomial P(x), with real coefficients, P(2+i)=0, P(1)=0 and P(0)=10. Express P(x) in the form P(x)=ax^3+bx^2+cx+d and solve the equation P(x)=0 Homework Equations The conjugate factor theorem The Attempt at a Solution Using remainder...

thanks I've got it now.

We're learning Polar Form next year and I have never heard of De Moivre's Theorem. So, is my second attempt incorrect?

I hope, I've posted this question in the right section. Homework Statement Solve the fooling equation over C z^3+ 8 = 0 The Attempt at a Solution First Attempt z^3 = -8 cube root (2 ^3) = cube root (8 i^2 ) z = 2i Second Attempt z^3 = -8 z ^3 = -2 ^3 so, z = -2

there are two vectors 59 km/h and 60km/h and they're traveling in the same direction. Shouldn't you add the two vectors?

Homework Statement A ford is traveling at 59 km/h while a Holden has a speed of 60 km/h Calculate the velocity of the Holden relative to the Ford when they are traveling in: in the same direction The Attempt at a Solution 59+60 = 119 km/h However the answer is 1 km/h...