Gate Exam

if x=2CosA-CosA, y=2SinA-Sin2A find dy/dx

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Gate Other Question

if x=2Cosθ-Cos2θ and y=2Sinθ-Sin2θ prove that dy/dx=tan(3θ/2) sinA + sinB + sinC = 4cosA/2.cosB/2.cosC/2