Q3 of 118 Page 5

Prove the following identities

(cosecx – sinx) (secx – cosx) (tanx + cotx) = 1

LHS = (cosecx – sinx) (secx – cosx) (tanx + cotx)


We know that




We know that sin2x + cos2x = 1.



= 1 = RHS


Hence proved.


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