Question

Please don't give irrevelant answers or you will be reported .​

Answer 1

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Answer 2

Answer:

note - i will be using ß in place of theta

LHS -

sec²ß - cos²ß

= (1 +tan²ß) -( 1-sin²ß)

= 1 + tan²ß -1 + sin²ß

= tan²ß + sin²ß = rhs

proved.

formula used

sec²ß - tan²ß = 1

sin²ß + cos²ß = 1

other important identity

cosec²ß - cot²ß = 1

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