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  1. If r sinθ = 1, r cosθ = √3 then the value of (r2 tanθ) is
    1. 4
    2. 1
      3
    3. 4
      3
    4. 4√3
Correct Option: C

r sinθ = 1        ..... (i)
r cosθ = √3         ..... (i)
On squaring and adding both equations,
r2 sin2θ + r2cos2θ = 1 + 3
⇒  r2 (sin2θ + cos2θ) = 4
⇒  r2 = 4

Again, =
r sinθ
=
1
r cosθ3

⇒  tanθ =
1
3

∴  r2 tanθ =
4
3



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