write formula of cosh(x+y)
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❄❄Hi mate your answer is ⤵⤵⤵⤵
▶▶cos(x+y) = cos x . cos y + sin x . sin y
also
▶▶cos(x-y) = cos x. cos y - sin x . sin y
Hope it helps you
✌✌✌✌✌✌✌
▶▶cos(x+y) = cos x . cos y + sin x . sin y
also
▶▶cos(x-y) = cos x. cos y - sin x . sin y
Hope it helps you
✌✌✌✌✌✌✌
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