Question

prove trigonometric ratios of 90 degree ​

Answer 1

Step-by-step explanation:

Let a rotating line →OX rotates about O in the anti-clockwise sense and starting from its initial position →OX traces out ∠XOY = θ where θ is very nearly equal to 90°. Take a point P on →OY and draw ¯PQ perpendicular to ¯OX.