Question

Find all solutions of the equation.

Answer 1

I think I have narrowed it down to either B or C.

Answer 2

I agree, it's either B or C. :)

For each of the "base" solutions, pi/4 and 3pi/4, in B you get a solution pi units later; in C you get a solution 2pi units later. Which one should it be?

Answer 3

I think it's C.

Answer 4

Right - because the period of the function is 2pi. So you want to pick up each co-terminal solution.

In B, you would get solutions in all 4 quadrants, which can't be since the sine value in the equation is positive (so only solutions in Q1 and Q2).

Answer 5

Thanks

Answer 6

yw