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Free online sine cosine tangent course worksheet has multiple choice quiz question: 2sin(x+45°)sin(x-45°) = with options cos2x, −cos2x, sin2x and −sin2x for college board examination to practice logic questions for free online competitions and examinations, study trigonometric identities multiple choice questions based quiz question and answers.

Sine Cosine Tangent Quiz

MCQ: 2sin(x+45°)sin(x-45°) =

1. cos2x
2. −cos2x
3. sin2x
4. −sin2x

B

Double Angle Identities Quiz

MCQ: Cos(α + β)cos(α - β) =

1. cos²α-sin²β
2. sin²α-cos²β
3. 2cosα
4. 2sinα

B

when Q(x) has repeated linear factors Quiz

MCQ: Partial fractions of 1/(x²-1) are equivalent to

1. Ax+B/(x²-1)
2. A/(x+1) + B/(x-1)
3. A/(x+1)
4. B/(x-1)

B

MCQ: (22 1/2)° =