Evaluate the sine, cosine, and tangent of the angle without using a calculator.

Question

-7𝜋/6

sin (𝜃) =

cos (𝜃) =



tan (𝜃) =

Answer 1

-7𝜋/6 is the same as 5𝜋/6 which is a 30° 60° 90° triangle in Quadrant II.

sin(θ) = 1/2

cos(θ) = -√3/2

tan(θ) = -√3/3