Quiz 7Name: ______________________Math 115-007November 5, 20091.(12 points) Given cos(θ) = 31(with θ in Quadrant I), find the following using the appropriate double-angle or half-angle formula:sin(θ) =38cos(θ2) =223831-sin(2θ) =2311-cos(2θ) =2311+tan(2θ) =311311+-sin(θ2) =383122.(2 points each) Find the following trigonometric values using half-angle or sum- and difference-identities.a.sin(12π) =22312)6cos(1-=-πb.tan(85π) =221221)45cos(1)45cos(1+-=+-ππ
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