A) 4/5
B) 3/20
C) 24/25
D) 1/50
Correct Answer: C
Solution :
\[\cos B=\frac{9+25-16}{2.3.5}=\frac{18}{2.3.5}=\frac{3}{5}\Rightarrow \sin B=\frac{4}{5}\] Therefore\[\sin 2B=2.\frac{4}{5}.\frac{3}{5}=\frac{24}{25}\].You need to login to perform this action.
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