Hi Swararagdath!
cos (x + y) = cos x cos y - sin x sin y
cos (x - y) = cos x cos y + sin x sin y
Written on Nov. 2, 2016, 8:55 p.m.
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Answer of this question
Cos(x y)
Davneet Singh
Comment
Hi Swararagdath!
cos (x + y) = cos x cos y - sin x sin y
cos (x - y) = cos x cos y + sin x sin y
Written on Nov. 2, 2016, 8:55 p.m.