Math, asked by oharsh14, 11 months ago

sin 20 sin 40° sin 80°​

Answers

Answered by faraanahmedhashmi
1

Answer:

hi..

Step-by-step explanation:

use the triple angle formula...

sinA* sin (60-A)*sin (60+A)=1/4 sin3A...

sin20* sin (60-20)*sin (60+20)=1/4 sin3*20

1/4 *sin 60=√3/8

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