In , , , and . Then the value of…

MATHEMATICS · Single correct · A Level · Mathematics · Trigonometry · Trigonometry

Problem

\triangle ABC

a=4

b=12

, and

B=60^\circ

. Then the value of

\sin A

is (1)

\frac{1}{2\sqrt{3}}

(2)

\frac{1}{3\sqrt{2}}

(3)

\frac{2}{\sqrt{3}}

(4)

\frac{\sqrt{3}}{2}