Question
The value of (sin 60 º cos 30 º - cos 60 º sin 30
º)  is equal to:Solution
(sin 60 º cos 30 º - cos 60 º sin 30 º) = √3/2 x √3/2 – 1/2 x 1/2 = 2/4 = 1/2 Alternate Solution sin A cos B - cos A sin B = sin (A - B) So, (sin 60 º cos 30 º - cos 60 º sin 30 º) = sin ( 60 º - 30 º) = sin 30 º = 1/2 Â
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A person, especially a young one, with exceptional abilities.
A person unselfishly concerned for or devoted to the welfare of others.
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Commend
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In each of the following questions, a word has been used in sentences in THREE different ways. Choose the option corresponding to the sentences in which...
Select the most appropriate antonym of the given word.
Authentic
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