Q. 4 B4.5( 2 Votes )

# Evaluate the following :

cosec^{2}30°.tan^{2}45° – sec^{2}60°

Answer :

We know that

cosec (30^{o}) = 2

Tan(45^{o}) = 1

sec (60 ^{o}) = 2

Now putting the values;

= (2)^{2} × (1)^{2} - (2)^{2}

= 4 – 4

= 0

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