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10 questions from this quiz
Products of trig functions to sums
12[sin(A+B)+sin(A−B)]\frac{1}{2}[\sin(A+B) + \sin(A-B)]21[sin(A+B)+sin(A−B)]
12[sin(A+B)−sin(A−B)]\frac{1}{2}[\sin(A+B) - \sin(A-B)]21[sin(A+B)−sin(A−B)]
12[cos(A+B)+cos(A−B)]\frac{1}{2}[\cos(A+B) + \cos(A-B)]21[cos(A+B)+cos(A−B)]
−12[cos(A+B)−cos(A−B)]-\frac{1}{2}[\cos(A+B) - \cos(A-B)]−21[cos(A+B)−cos(A−B)]
Addition and subtraction identities
Signal processing
12[sin5x+sinx]\frac{1}{2}[\sin 5x + \sin x]21[sin5x+sinx]
12[cos6x+cos2x]\frac{1}{2}[\cos 6x + \cos 2x]21[cos6x+cos2x]
Simplify trigonometric expressions
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