Olympiad Mathematics - Solve The Trigonometry Problem

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Olympiad Mathematics - Solve The Trigonometry Problem
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Brother which application you use for screen board

mathme
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And kindly tell me the name of screen recording application... thank you

mathme
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oh yes! a trignometry problem. i studyed them yesterday (a little)

SuperYoonHo
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How to be expert in trigonometry pls let me know

mondirasarker
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Can't we use cosecx-cotx=tan(x/2)?
Then we get sinx=cotx or cosx=sin^2x

advaykumar
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Bro theta equals 90 So the answer is 2

vimaladevi