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OpenStudy (anonymous):
Evaluate: f(x)=2sinx+4cos2x @x=π/6
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OpenStudy (anonymous):
x = π/6 f(π/6) = 2sin(π/6) + 4cos(π/3) f(π/6) = 2 * 1/2 + 4 * 1/2 f(π/6) = 1 + 2 = 3
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