(i)
(4, 3)
Sol.
The terminal arm passes through P (4, 3)
∴ x
= 4 and y = 3
r = √(x2+y2
)
∴ r =√(42+32
)
∴ r =√(16+9)
∴ r =√25
∴ r = 5
Let the
angle be θ
sin θ = y/r = 3/5
cosec θ = r/y = 5/3
cos θ = x/r = 4/5
sec θ = r/x
= 5/4
tan θ = y/x =3/4
cot θ = x/y = 4/3