\operatorname { sec } ^ { 2 } x + \operatorname { cosec } ^ { 2 } x = – InterviewSolution

1.	\operatorname { sec } ^ { 2 } x + \operatorname { cosec } ^ { 2 } x = \operatorname { sec } ^ { 2 } x \cdot \operatorname { cosec } ^ { 2 } x
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