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Firsova Kamila

--1. If Sin A =2the value of Cos A5%3D3(यदि Sin A = में हो तो Cos A का मान है)​

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130 cents Lucille Torres
Answer:

cos4x+cos3x+cos2x

=

(sin4x+sin2x)+sin3x

(cos4x+cos2x)+cos3x

=

2sin3xcosx+sin3x

2cos3xcosx+cos3x

=

sin3x[2cosx+1]

cos3x[2cosx+1]

=cot3x

298
Lucille Torres
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