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| DDD Find the value of sin 90°, using the double-angle formula. DDD |
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| DDD Using the double-angle formula, find the value of cos 120°. DDD |
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| DDD Using the double angle formula, find the value of tan 120°. DDD |
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DDD If sin θ = 725 and θ is in first quadrant, then find the exact value of cos 2θ.
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| DDD If sin A = 35 and 0° < ∠A < 90°, then what is the value of sin 2A? DDD |
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DDD If 90° < ∠B < 180° and sin B = 1213, then find the value of tan 2B.
DDD |
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| DDD If tan B = - 13 and 90° < ∠B < 180°, then the value of cos 2B is: DDD |
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| DDD If 180° < θ < 270° and sin θ = - 13, then find the value of sin 2θ. DDD |
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| DDD If ∠C is in fourth quadrant and cos C = 2425, then find the value of cos 2C. DDD |
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| DDD Using half-angle formula, the value of sin 15° is: DDD |
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DDD Using half angle formula, the exact value of cos 75° is:
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| DDD Choose the value of tan 150° from the following. DDD |
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DDD If 0° < θ < 90° and sin θ = 1213, then the exact value of sin θ2 is:
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DDD If 90° < ∠B < 180° and sin B = 45, then the exact value of cos B2 is _________.
DDD |
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| DDD If ∠ A is in third quadrant and cos A = - 513, then the exact value of cos A2 is: DDD |
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| DDD If 270° < ∠ C < 360° and cos C = 35, then the value of tan C2 is: DDD |
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| DDD Evaluate cos 22.5° using a half-angle formula. DDD |
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| DDD If 180° < θ < 270° and cos θ = - 2425, then the exact value of sin 2θ is: DDD |
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| DDD Choose the formula that corresponds to the value of cos 4θ. DDD |
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DDD Using double-angle formulas, choose the formula that corresponds to the value of sin 6θ.
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| DDD Using the half-angle formula, write a formula for cos (A4). DDD |
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| DDD In right triangle ABC, if ∠B = 90°, then cos2 (C2) = ? DDD |
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| DDD Write cos 2θ in terms of tan θ using double-angle formula. DDD |
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| DDD Using half-angle formula, find the value of tan 15°. DDD |
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