Math, asked by ankitsharma5675, 4 months ago

Sin 20° + Sin 140° + cos 170°

Answers

Answered by LynxLada

3

Answer:

0 is the answer.

Step-by-step explanation:

Sin 20 + Sin 140 + Cos 170

2 Sin 80 • Cos 60 + Cos 170

2 Sin 80 + 1/2 + Cos 170

Sin 80 + Cos (90 + 80)

Sin 80 - Sin 80

0

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