Math, asked by eli27, 10 months ago

If O is a positive acute angle such that sec O= cosec 60, find the value of 2 cos2 O-1.

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Answered by amitabhnair2004

3

I hope this will be help you.

please mark in brain list.

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Answered by anju94406

0

Answer:

,-1/2 is the answer for you r question

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