The value of \sin ^{2} 42^\circ+\sin ^{2} 48^\circ+\tan ^{2} 60^\circ-{\cosec} 30^\circ is equal to:

SSC CGL 13 Jun 2019 Shift 1 Paper

Question : 55 of 100

Marks: +1, -0

The value of

\sin ^{2} 42°+\sin ^{2} 48°+\tan ^{2} 60°-{\cosec} 30°

is equal to:

Solution:

\sin ^{2} 42°+\sin ^{2} 48°+\tan ^{2} 60°

-{\cosec} 30°

=1+3-2 =2

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