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Evaluate cos 30° sin 60° + cos 60° sin 30°.(a) 2(b) 0(c) 1(d) ∞I have been asked this question in class test.The above asked question is from Trigonometric Ratios of Specific Angles topic in portion Trigonometry of Mathematics – Class 10

Answer» RIGHT choice is (c) 1

The EXPLANATION: cos 30° sin 60° + cos 60° sin 30° = \(\frac {\SQRT 3}{2} . \frac {\sqrt {3}}{2} + \frac {1}{2} . \frac {1}{2}\)

= \(\frac {3 + 1}{4}\)

= \(\frac {4}{4}\)

= 1


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