Published by:
CGP EDU Academic Team
Published on: August 12, 2026
16sin(20°) sin(40°) sin(80°) is equal to :
A
B
2 
C
3
D
4 
Text Solution
Verified by ExpertsThe correct answer is:
B
16sin20 0 sin40°sin80 0
= 16 sin 40° sin 20° sin 80°
= 4(4 sin (60 - 20) sin (20) sin (60 + 20))
= 4 x sin (3 x 20°)
[ 
sin 3 
= 4 sin(60 - 
) x sin 6 x sin (60 + 
)]
= 4 x sin 60°
= 4x sin60 0
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