Question

If cos θ = 4/5 then find the value of tan θ.

Answer 1

Step-by-step explanation:

Let the triangle be ABC with right angle at B

cos θ=BC/AC=4/5

=>AC=5

BC=4

Now AB²+BC²=AC²

AB²=5²-4²

=>AB²=3²

=>AB=3

tan θ=AB/BC

=3/4