Math, asked by pranasya4724, 1 year ago

Evaluate cosec13/sec77-cot20/tan70

Answers

Answered by Thatsomeone

cosec 13 / sec 77 - cot 20 / tan 70

= sec 77/ sec 77 - tan 70 / tan 70

= 1 -1

= 0

GOR THIS EXAMPLE YOU SHOULD KNOW

cosec A = sec (90 - A )

tan A = cot (90 - A)

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