Q. 15.0( 5 Votes )

If θ is an acute A.

B.

C.

D.

Answer :

Given,


cos θ = 3/5


In ∆ ABC,


Untitled1.png


AC2 = AB2 + BC2


(5)2 = AB2 + (3)2


25 = AB2 + 9


25 – 9 = AB2


16 = AB2


4 = AB


Therefore,


AB = 4


As,


sin θ = AB/AC = 4/5


tan θ = AB/BC = 4/3


Now,






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