Math, asked by kulvir7353, 9 months ago

4Cos6.cos42.cos60.cos66.cos78=

Answers

Answered by guravaiah97040
0

ANSWER :

LHS

-COS 6 COS 42 COS66 COS 75

=1 BY 2 (COS 72+COS 60

WHERE2

cos 42 COS 78 =(1BY 2) (COS 36+COS 120 )

=3 BY 8;

Step-by-step explanation:

I HOP IT IS CLEAR FOR YOU IF YOU HAVE ANY DOUBTS ASK .........

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