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| BB Find the value of sin 90°, using the double-angle formula. BB |
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| BB Using the double-angle formula, find the value of cos 120°. BB |
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| e Using the double angle formula, 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.
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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.
e |
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| e If tan B = - 13 and 90° < ∠B < 180°, then the value of cos 2B is: 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 Using half-angle formula, the value of sin 15° is: e |
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e Using half angle formula, the exact value of cos 75° is:
e |
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| e Choose the value of tan 150° from the following. e |
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e If 0° < θ < 90° and sin θ = 1213, then the exact value of sin θ2 is:
e |
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e If 90° < ∠B < 180° and sin B = 45, then the exact value of cos B2 is _________.
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| e If ∠ A is in third quadrant and cos A = - 513, then the exact value of cos A2 is: e |
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| e If 270° < ∠ C < 360° and cos C = 35, then the value of tan C2 is: 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 the 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.
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| e Using the half-angle formula, write a formula for cos (A4). e |
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| e In right triangle ABC, if ∠B = 90°, then cos2 (C2) = ? e |
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| e Write cos 2θ in terms of tan θ using double-angle formula. e |
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| e Using half-angle formula, find the value of tan 15°. e |
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