1.

Cosec A cosec A cosec A -1 + 2 sec2 A cosec A +1

Answer»

sec A -1+ 2 sec square A .cosec A +1

= 3 ( cot square thita) -1+2 (1+ tan square thita ) . √ 1+ cot square thita +1

= 3( COS A / sin A )-1+2 .1 ( sin A / cos A) √1 + cos A / sin A +1

3.-1+2.1.√1 + cos A / sin A +1

3+2.1 ( cot thita )

5.1 ( cot thita)

5 cot theta



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