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Ex 8.2, 1 - Evaluate: (i) sin 60 cos 30 + sin 30 cos 60 - Trignometric ratios of Specific Angles - Evaluating

Ex 8.2, 1 - Chapter 8 Class 10 Introduction to Trignometry - Part 2

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Ex 8.2, 1 Evaluate the following : (i) sin 60 cos 30 + sin 30 cos 60 We know that, sin 60 = 3/2 cos 30 = 3/2 sin 30 = 1/2 cos 60 = 1/2 Putting all values sin 60 cos 30 + sin 30 cos 60 = ( 3/2) ( 3/2)+(1/2) (1/2) = ( 3 3)/(2 2)+1/(2 2) = 3/4 + 1/4 = (3 + 1)/4 = 4/4 = 1 Hence, sin 60 cos 30 + sin 30 cos 60 = 1

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