iCoachMath.com: Examples on Double Angles and Half Angles - Trigonometric Identities and Equations - Kentucky(KY)
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Curriculum: Kentucky Math Framework   Click to change Curriculum

Topic: Trigonometric Identities and Equations   Click to change Topic

Lesson: Double Angles and Half Angles   Click to change Lesson

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cc  Use the double-angle formula to find the value of sin 90°.  cc View Solution
cc  Use the double-angle formula to find the value of cos 120°.
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cc  The value of sin 300° is _______  cc View Solution
cc  The value of tan 240° is _______ .
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cc  Use the double angle formula to find the value of tan 120°.
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cc  If sin θ = 725 and θ is in first quadrant, then find the exact value of cos 2θ.
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cc  If sin A = 35 and 0° < A < 90°, then what is the value of sin 2A?
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cc  If 90° < B < 180° and sin B = 1213, then find the value of tan 2B.

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cc  If tan B = - 13 and 90° < B < 180°, then find the value of cos 2B.
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cc  If 180° < θ < 270° and sin θ = - 13, then find the value of sin 2θ.
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cc  If C is in fourth quadrant and cos C = 2425, then find the value of cos 2C.
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cc  Use half-angle formula to find the value of sin 15°.  cc View Solution
cc  Find the exact value of cos 75° using half angle formula.
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cc  Find the exact value of tan 150° using half-angle formula.  cc View Solution
cc  If 0° < θ < 90° and sin θ = 1213, then find the exact value of sin &theta;2.
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cc  If 90° < B < 180° and sin B = 45, then find the exact value of cos B2.
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cc  If A is in third quadrant and cos A = - 513, then find the exact value of cos A2.  cc View Solution
cc  If 270° < C < 360° and cos C = 35, then find the value of tan C2.  cc View Solution
cc  Evaluate cos 22.5° using half-angle formula.
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cc  Evaluate sin 67.5°.  cc View Solution
cc  The value of tan 202.5° is ________  cc View Solution
cc  Evaluate cos 112.5°.
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cc  If 180° < θ < 270° and cos θ = - 2425, then the exact value of sin 2θ is _________
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cc  Choose a formula that corresponds to the value of cos 4θ.
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cc  Using double-angle formulas, choose the formula that corresponds to the value of sin 6θ.
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cc  Using double-angle formulas, choose the formula that corresponds to the value of cot 4A.
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cc  Using the half-angle formula, identify a formula for cos (A4).
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cc  In ΔDEF if E = 90°, then find the value of sin 2D.
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cc  In right triangle ABC, if B = 90°, then find the value of cos2(C2).
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cc  Which one of these represents sin 2θ in terms of tan θ?

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cc  Choose a formula that represents cos 2θ in terms of tan θ.  cc View Solution
cc  Simplify 1-cos2Asin2A.

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cc  The value of cos215° - sin215° =
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cc  Use half-angle formula to find the value of tan 15°.
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cc  Simplify:
(tan θ + cot θ) sin 2θ  cc
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cc  Find the value of (sin A + cos A)2 in terms of sin 2A.  cc View Solution
cc  Find the value of (cos4A - sin4A) in terms of cos 2A.
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cc  (cot θ - tan θ) =
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cc  Find the value of cot x - cos&nbsp;2xsin&nbsp;x&nbsp;cos&nbsp;x.   cc View Solution
cc  If cos x = 0.25 then cos (x2) =
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cc  If cosec θ = p&nbsp;+&nbsp;qp&nbsp;-&nbsp;q, then find the value of cot (14π + 12θ ).
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