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College math practice test MCQ: sin(a+45°)sin(a-45°) = with options −1/2cos(2a), −1/2sin(2a), 1/2cos(2a) and none of above for scholars competing for college and universities' scholarships with college board and MCAT prep. Free study guide is for online learning sine cosine tangent quiz with MCQs to practice test questions with answers.

MCQ: Sin(A+45°)sin(A-45°) =

1. −1/2cos(2A)
2. −1/2sin(2A)
3. 1/2cos(2A)
4. None of Above

A

MCQ: Sin5θcos2θ =

1. 1/2[sin7θ+sin3θ]
2. [sin7θ+sin3θ]
3. 1/2[sin7θ-sin3θ]
4. None of Above

A

MCQ: 2sin12°sin46° =

1. cos34°cos58°
2. sin34°+sin58°
3. sin34°-sin58°
4. cos34°-cos58°

D

MCQ: (cos(x)-cos3x)/(sin3x-sin(x)) =

1. cot2x
2. tan2x
3. csc2x
4. sec2x

B

MCQ: 2sin(x+45°)sin(x-45°) =

1. cos2x
2. −cos2x
3. sin2x
4. −sin2x

B