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Using sum formulas, find sin of the angle 75°.
A(√3 − 1)/4
B(√6 + √2)/4
C(√6 − √2)/4
D(√3 + 1)/2
Answer & Solution
Correct answer: B. (√6 + √2)/4
sin 75 = sin 45 cos 30 + cos 45 sin 30 = (√3 + 1)/(2√2) = (√6 + √2)/4.
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