1. ## Trigonometric function

I need to find the value of the trigonometric function y=(1/2)sin(2x-2π), x's range is (π/3 ; 5π/8), i am okay with the first few steps :
π/3 < x < 5π/8 |*2
2π/3 < 2x < 5π/4 | - 2π
-4π/3 < 2x - 2π < - 3π/4
However, here's when i get confused
How should i solve the rest of the problem?

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2. ## Re: Trigonometric function

Originally Posted by carrie9987
I need to find the value of the trigonometric function y=(1/2)sin(2x-2π), x's range is (π/3 ; 5π/8), i am okay with the first few steps :
π/3 < x < 5π/8 |*2
2π/3 < 2x < 5π/4 | - 2π
-4π/3 < 2x - 2π < - 3π/4
However, here's when i get confused
How should i solve the rest of the problem?
SEE HERE