Math, asked by arpityadav9559, 1 year ago

14 give me answere????

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Answered by gauravmahore
1
cos7x+cosx= o


given that 8x=π

x=π/8


L.H.S.

COS7X+COSX


COS7π/8 +COSπ/8



COS (π-π/8)+COSπ/8


-COSπ/8+COSπ/8


=0



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arpityadav9559: thanks
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