Question

For which value of O is sin O= -1

Answer 1

assuming you meant sin(θ) = -1, Check the picture below.

Answer 2

O = 2 π n - π/2 for n element Z

Explanation:

Solve for O:

sin(O) = -1

Hint: | Eliminate the sine from the left hand side.

Take the inverse sine of both sides:

Answer: O = 2 π n - π/2 for n element Z