Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (27°) – sin (27°) = cos(A°), then A - degrees. (b) If cos (92)– sin (9x) = cos(B), then B.

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Q: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (25°) –…

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A: Please see the below picture for detailed solution.

Q: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (32°) –…

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Q: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (24°) –…

A: As we know that the trigonometric identities  cos2x-sin2x=cos(2x)

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Q: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (25°) –…

A: Cos²x-sin²x=cos2x

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A: The value of sin2x,cos2x and tan2x is given below in the explanation of the solution.....

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Q: Sin α = 7/25 it lies in quadrant II... and cosβ= -2/5 lies in quadrant III. What is tan(α+β)

A: Given,          sinα=725 in lies in quadrant II.           cosβ=-25 in quadrant III.

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Q: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (24°) –…

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Q: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (27°) - sin…

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A: We know, cos²(x) - sin²(x) = cos(2x)

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Q: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (26°) – sin…

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Q: Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (28°) – sin…

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Q: Using a double-angle or half-angle formula to simplify the given expressions (a) If cos (40°) – sin…

A: cos2A-sin2A=cos 2A

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A: NOTE: Refresh your page if you can't see any equations. . use the formula