Recent content by DLxX

1. Solve for theta in the interval 0<theta<2pi. Give answers in radians either correct to 3 decimal places or as exact values. 13cos^2 - 5cos = 12sin^2 - 6 3) Scientists use visual magnitude to measure the brighness of a star. The smaller the number, the brighter the star. An increase in...

Probability Questions: urgent help needed I am having a pretty hard time differentiating between the difference between these two things: Mutually Exclusive, and Independant. When do you know which formula to use? The same thing applies with *And* and *Or* problems. I understand how...

Alright so that would give me the k value, but what about the h value?

x = y^2 + 4y + k. So to solve for k do I then plug in 12 and 1 for x and y?

would be a sideways since the y is squared, but how would i find the h in (h,k)?

I need help with the following question. The parabola y^2 - x + 4y + k = 0 passes through the point (12,1). Find the vertex of the parabola.

Ive already done these problems and I think I'm doing them correctly, but I can't be 100% sure since I don't have the answers. Please help if you can since I have my test tommorow. Thanks Here are some of the questions 1. If 2.6 moles of P4 and 3.6 moles of H2 are reacted till the...

Thank you. I've changed my original post.

I need help with the following questions. If you don't have time to solve both then please do the 2nd one. The answers I got are 1a .5 1b 1 1c not sure how to do it 2a 3.86 2b 2.42^13 Are they correct? 1) For the following reaction 2SO2 + O2 <_-_-_-_-_-> 2SO3 What...

For number 2a) I got 9.6 and 170.4 degrees. and for 2b) I got 60 and 300 degrees. Is this correct?

I'm in Grade 12 Pre Calculus and this assignment isn't based on new material, but material most likely learned in Grade 11 Pre Calculus, so I doubt I have to use Calculus. Unless the Calculus needed is very basic.

For number 3 I ended up getting x as 16 and y as 24, using guess and check. Is this correct?

1. Given csc(-) = 1.4, what is one possible value of (-) in radians? 2. Solve for (-) in each equation. Give the exact value if possible. The domain is the set of all real numbers. a) 2sin(3theta)=1 b) 2sin(-) cos(-) =sin(-) (-) = theta btw 3. A rectange has a length of x and...

Ok I can graph sin(x) , cos(x) , and tan(x) pretty easily, but I'm having a hard time graphing the csc, sec, and cot ones. For the first three I just found the values of pi/2 pi 3pi/2 and 2pi. So for example pi/2 for sin(x) would be sin 90 or sin pi/2 which is equal to 1. I then just put a...

So I can essentially just multiply the 2 denominators of any problem like this and still get the correct answer? Or factor out the 2 denominators and multiply all the factors with each other, crossing out all the factors that were in both?