Find the values of the following trigonometric ratios:
Given 
⇒ -tan 585° = -tan (90° × 6 + 45°)
585° lies in the third quadrant in which the tangent function is positive.
∴ tan (-585)° = -tan (90° × 6 + 45°)
= - (tan 45°)
= -1
1
Find the values of the following trigonometric ratios:
Given
⇒ -tan 585° = -tan (90° × 6 + 45°)
585° lies in the third quadrant in which the tangent function is positive.
∴ tan (-585)° = -tan (90° × 6 + 45°)
= - (tan 45°)
= -1