Math, asked by rajsingla33, 3 months ago

If sine + cos40 = 1 + 4k sin20 + cos20, then find the value of k.

Answers

Answered by sudhanshudhek76

5

cos ( 90° - 40° ) + cos40 = 1 + 4k × 1

1 = 1 + 4k

0 = 4k

k = 0

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