Question

sin0
∘
=cos90
∘
,sin30
∘
=cos60
∘
,sin45
∘
=cos45
∘
,andsin90
∘
=cos0
∘
,
)
what is sin60
∘
equal to?
A. sin60
∘
=cos15
∘

B. sin60
∘
=cos30
∘

C. sin60
∘
=cos20
∘

D. sin60
∘
=cos60
∘

Answer 1

To find the value of \( \sin 60^\circ \), we can use the fact that \( \sin \theta = \cos(90^\circ - \theta) \).

Using this formula:

\[
\sin 60^\circ = \cos(90^\circ - 60^\circ) = \cos 30^\circ
\]

So, the correct answer is:

**B. \( \sin 60^\circ = \cos 30^\circ \)**.