Question

Help please! will give brainliest! and can please explain.

Answer 1

Answer: 150

We know that cos Ф = sin (90 - Ф)

If Ф = 150, then:

cos 150 = sin (150 - 90)

cos 150 = sin 60

Using the equation they gave us:

cos 150 = sin ( $\frac{150}{3}$ - 10)

cos 150 = sin 60