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Question
Difficulty Level:

Medium

MCQ

Consider the following expression:

cos(3π4)sin(5π12)−sin(3π4)cos(5π12)\cos (\frac{3 \pi}{4}) \sin (\frac{5 \pi}{12})-\sin (\frac{3 \pi}{4}) \cos (\frac{5 \pi}{12})

Find the exact value of the expression without a calculator.

Select all that apply :

−32-\frac{\sqrt{3}}{2}

12\frac{1}{2}

56\frac{5}{6}

89\frac{8}{9}

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