Question

Sin^2x - 2sinx + 1 = 0

Answer 1

90, 270 degrees

Explanation:

sin(x) = a

a^2 - 2a + 1 = 0

(a-1)^2 = 0

1 = a

So...

1 = sin(x)

90, 270 = x

Answer 2

Explanation:

x=Pi /2+2 Pi n