Question

Use a double-angle identity to find the exact value of each expression.
sin 90°

Answer 1

1 is going to be your correct answer

Answer 2

1

Explanation:

`\sin 2x=2\sin x \cos x \\ \\ \sin 90^(\circ)=2\sin 45^(\circ) \cos 45^(\circ) \\ \\ =2(1/√(2))(1/√(2)) \\ \\ =2(1/2) \\ \\ =1`