integrate cos7x.cos2x
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Hi Mate ! ! !
Cos ( A ) Cos ( B ) = 1 / 2 { cos ( A + B ) + cos ( A - B )
Cos 7 x cos 2x =. 1/2. { cos 9x /2 + cos 5x /2}
So, it's integration is
ok u got it
Cos ( A ) Cos ( B ) = 1 / 2 { cos ( A + B ) + cos ( A - B )
Cos 7 x cos 2x =. 1/2. { cos 9x /2 + cos 5x /2}
So, it's integration is
ok u got it
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