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If f(x) = sin 2x + cos x, find f(/2).
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High School Teacher
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f(x) = sin2x + cosx
We need to find f(pi/2)
We will substitute with x= pi/2
==> f(pi/2) = sin(2*pi/2) + cos (pi/2)
= sin(pi) + cos(pi/2)
= 0 + 0 = 0
Then the value of f(pi/2) = 0
Posted by hala718 on April 16, 2011 at 12:08 PM (Answer #1)
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