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| e Use the double-angle formula to find the value of sin 90°. e |
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e Use the double-angle formula to find the value of cos 120°. e |
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e Use the double angle formula to find the value of tan 120°. e |
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e If sin θ = 725 and θ is in first quadrant, then find the exact value of cos 2θ. e |
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e If sin A = 35 and 0° < ∠A < 90°, then what is the value of sin 2A? e |
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e If 90° < ∠B < 180° and sin B = 1213, then find the value of tan 2B.
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e If tan B = - 13 and 90° < ∠B < 180°, then find the value of cos 2B. e |
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e If 180° < θ < 270° and sin θ = - 13, then find the value of sin 2θ. e |
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e If ∠C is in fourth quadrant and cos C = 2425, then find the value of cos 2C. e |
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| e Use half-angle formula to find the value of sin 15°. e |
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e Find the exact value of cos 75° using half angle formula. e |
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| e Find the exact value of tan 150° using half-angle formula. e |
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e If 0° < θ < 90° and sin θ = 1213, then find the exact value of sin θ2. e |
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e If 90° < ∠ B < 180° and sin B = 45, then find the exact value of cos B2. e |
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| e If ∠ A is in third quadrant and cos A = - 513, then find the exact value of cos A2. e |
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| e If 270° < ∠ C < 360° and cos C = 35, then find the value of tan C2. e |
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e If 180° < θ < 270° and cos θ = - 2425, then the exact value of sin 2θ is _________ e |
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e Choose a formula that corresponds to the value of cos 4θ. e |
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e Using double-angle formulas, choose the formula that corresponds to the value of sin 6θ. e |
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e Using double-angle formulas, choose the formula that corresponds to the value of cot 4A. e |
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e Using the half-angle formula, identify a formula for cos (A4). e |
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e In ΔDEF if ∠E = 90°, then find the value of sin 2D. e |
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e In right triangle ABC, if ∠B = 90°, then find the value of cos2(C2). e |
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e Which one of these represents sin 2θ in terms of tan θ?
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| e Choose a formula that represents cos 2θ in terms of tan θ. e |
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e Use half-angle formula to find the value of tan 15°. e |
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| e Find the value of (sin A + cos A)2 in terms of sin 2A. e |
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e Find the value of (cos4A - sin4A) in terms of cos 2A. e |
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| e Find the value of cot x - cos 2xsin x cos x. e |
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e If cosec θ = p + qp - q, then find the value of cot (14π + 12θ ). e |
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