Math, asked by aaditkushal, 9 months ago

cos 2a = ?
please answer super fast

Answers

Answered by ishit56

2

Answer:

cos2a= 1/cosec

Step-by-step explanation:

1/cosec +1/cosec

Answered by varsha3330

3

Answer:

cos2A=cos square A -- sin square A

= 1-2sin square A

= 2cos squareA --1

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