Q.

Find the value of x in given trigonometric equation:

tan 3x = sin 45º cos 45º + sin 30º.

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a

10º

b

20º

c

15º

d

25º

answer is B.

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Detailed Solution

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We have,

tan 3x = sin 45º cos 45º + sin 30º

tan3x=12×12+12

tan3x=12+12=1

tan 3x =1=tan45º

3x=45º

So, x=15º.

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Find the value of x in given trigonometric equation:tan 3x = sin 45º cos 45º + sin 30º.