Hello, aargh27!

Is there a typo in #1? .Did you leave out a trig function?

. . By the way, is spelled "pi".

1 ) Find the exact value of

2) Find the solutions of: on the interval

Replace with

Replace with

Then we have: .

. . which simplifies to: .

. . which factors: .

And we have two equations to solve:

. .

. .