Edwin W.
asked • 04/16/23Calculus 1 trig
How can i simplify cos(-x+pi/2)?
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1 Expert Answer
Raymond B. answered • 04/16/23
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Math, microeconomics or criminal justice
cos(a-b) = cosacosb + sinasinb, with a=-x, b=pi/2
= cos(-x)cos(pi/2) + sin(-x)sin(pi/2)
= (cosx)(0) + (-sinx)(1)
= 0-sinx
=-sinx
Doug C.
If a = (-x), then the identity used is cos(a+b)?
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04/16/23
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Doug C.
desmos.com/calculator/bzutt74zhr04/16/23