Quandaries
and Queries 

name: Weisu secondary school I have some questions about precalculus. I tried the problems, and here is what I have so far: (1) (cos(x))^2=1(sin(x))^2, so substituting, (2) I don't know where to start here. (4) starting with the original equation, tan(x)*csc(x) (5) I don't know
where to start here. Weisu 

Hi Weisu, I can help with a few of your problems.
For problems 5, 6 and 7 draw a right triangle and write down what you know. For example for problem 6. In the diagram sin(t) = 24/25, so tan(arcsin(24/25)) is the tangent of t. Use Pythagoras' Theorem to find the length of the third side of the triangle, and then find tan(t). Penny 

