Math, asked by pintuboss22, 7 months ago

cos 20 +COS 100 +C0s140=0

Answers

Answered by gowdaramyar8

0

Answer:

may be my answer helps you

Step-by-step explanation:

Prove that: cos 20 ^0cos 100^0+cos 100^0cos 140^0-\ cos 140^ 0cos 200^0=-3,4.

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