If tanθ = a/b, show that 
Consider the LHS = 
(Dividing the numerator and denominator by cos θ)
= 
= 
= 
= RHS
HENCE PROVED
19
If tanθ = a/b, show that
Consider the LHS =
(Dividing the numerator and denominator by cos θ)
=
=
=
= RHS
HENCE PROVED