Question

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Answer 1

Verified answer

4][
cos 2x - sin x = 0
(1 - 2sin² x) - sin x = 0
(-2 sin x + 1)(sinx +1) = 0
sin x = 1/2 --> x = 30° (1/6 π) , 150° (5/6 π)
sin x = -1 --> x = 3/2 π

HP = {π/6 , 5π/6 , 3π/2}

0psi B

5][
1 + sin x = 3(1 - sin x)
sin x + 3 sin x = 3 - 1
4 sin x = 2
sin x = 1/2 --> x = 30° , x = 150°

Opsi C

Answer 2

Verified answer

4.


5.