Question

Cosθ<0, sinθ<0. In which quadrant does terminal side of θ lie?

Answer 1

`thetainQ_3`

Explanation:

it is clearly given that `costheta<0rArrcostheta=-ve` and `costheta=-ve in Q_2 and Q_3`
since `sintheta<0rArrsintheta=-ve` and `sintheta=-ve in Q_3 and Q_4` common quadrant where both `sintheta and costheta` are `-ve` is `Q_3`
hence `theta in Q_3`