Theninja888 Theninja888

17-06-2016
Mathematics

Answered

Verify the identity. (7 points)

cos quantity x plus pi divided by two = -sin x

Verified Answer :

jhonyy9 jhonyy9

17-06-2016

do you think

cos(x + pi/2) = -sin x ?

so hopw you learned about formula cos(a+b) = ?

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