Q. 4 B4.5( 2 Votes )

Evaluate the following :

cosec230°.tan245° – sec260°

Answer :

We know that


cosec (30o) = 2


Tan(45o) = 1


sec (60 o) = 2


Now putting the values;


= (2)2 × (1)2 - (2)2


= 4 – 4


= 0


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