(vi) (– 2, – 3)
Sol. The terminal
arm passes through P (– 2, – 3)
∴ x = – 2 and y = – 3
r = √(x2+y2
)
∴ r =√((-2)2+(-3)2
)
∴ r =√(4+9)
∴ r =√13
Let the
angle be θ
sin θ = y/r = -3/√13
cosec θ = r/y = -√13/3
cos θ = x/r = -2/√13
sec
θ = r/x = -√13/2
tan θ = y/x =3/2
cot θ = x/y = 2/3
