Math, asked by Yashaswini06, 3 months ago

sin10°+sin20°+sin40°+sin50°=

Answers

Answered by MySticSoul

1

Answer:

LHS=(sin10+sin50)+(sin20+sin40)

=(2sin 30cos 20)+(2sin 30cos 10)

=2sin 30(cos10+cos20)

=2×

2

1

(sin80+sin70)

=sin70+sin80=RHS

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