If 3cotθ = 4, show that

20

If 3tanA = 4, show that

21

If 3cotθ = 2, show that

23

If secθ = 17/8, verify that

24

In the adjoining figure, ∠B = 90°, ∠ BAC = θ°, BC = CD = 4cm, AD = 10cm. find

i. sinθ

ii. cosθ