1.

Assertion (A) : tan 70^(@) - tan 20^(@) = 2 cot 40^(@) Reason (R ) : If A + B = 90^(@)then tan A. tan B = 1

Answer»

A is true R is TURE and R is corect explanation of A
A is true, R is true and R is not correct explanation of A
A is true ,R is FALSE
A is false, R is true

Answer :A


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