Q20 of 35 Page 288

If 3tanA = 4, show that

We have, 3tanA = 4


→ tanA = 4/3 (1)


Consider the LHS =


(Dividing the numerator and denominator by cosθ )


=


= (from(1))


=


= 8/10


= 4/5


= RHS


HENCE PROVED


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