jika nilai sin a = -3/4 dan sudut a terletak dikuadatkan IV , nilai tan a =

Given Pythagorean Theorem, x^2 + y^2 = c^2
Thus 16-9 = x^2
x = √7

Therefore
Tan a = y/x
On K IV, (-y,x)

Tan a = (-3)(√7)/7