If sin θ = 3/5 and θ is acute angle, find (i) cos θ (ii) tan θ.

(i) By formula, ⇒ sin 2 θ + cos 2 θ = 1 Substituting values we get, Since, θ is an acute angle and value of cos is positive in first quadrant. ∴ cos θ = . Hence, cos θ = . (ii) By formula, tan θ = = . Hence, tan θ = .