Math, asked by ch9atBaneetubanersi, 1 year ago

sin7x+sinx/cos5x-cos3x=sin2x-cos2xcotx

Answers

Answered by abhi178

first of all we should understand solve this type question all formula remember in our memory
so use formula sinC+sinD and cosC-cosD
2sin4x.cos3x/-2sin4x.sinx
=-cos3x/sinx
=-cos (2x+x)/sinx
=sin2x-cos2x. cotx

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