Find the exact value of cos C in simplest radical form. C √84 B 20 22 A

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Q: cos 18° cos 12° cos 72° cos 78° sin 62° sin 73° - sin 28° sin 17° -

A: On Simplifying we get   6​/2                                         Explanation:

Q: sin COS 7π 24 π 7 COS COS T 24 4π 21 - COS sin 7π 24 TU 7 sin sin TU 24 4π 21

A: solution 2​Explanation:Step 1:Step 2: Step 3: Step 4:

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A: 7x^2 - 6√(3)xy - 13y^2 - 16 = 0

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A: csc3⁡x−4csc⁡x=3−cot2⁡x;[π,2π)

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A: (7) Let assume,

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A: The objective of this question is to find the value of the given expression (3√-3)(-7√-12).

Q: R √8 Q 5 V33 P

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Q: If =3π/ 4, find the exact value of each expression below. Cos2θ Cos(-0)=

A: cos243π​=21​ cos(−0°)=1  Explanation:Given that, θ=43π​ So, cos2θ=(cosθ)2 =(cos43π​)2 =(2​1​)2 =21​…

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A: The answer is -Sin(2α)Explanation:

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A: Explanation of the answer is as follows

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Q: But A-C=7-(-13)=20. Correct?

A: Conic section-

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