Answers

2014-04-19T03:42:16+05:30
Sec²a=1+tan²a
cosec²a=1+cot²a
√sec²a+cosec²a=
√1+tan²a+1+cot²a=√(tan a +cot a)^2
=tan a +cot a
since
(tan a + cot a)^2=
tan²a+2+cot²a
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