Trigonometric Ratios - Practice Questions & MCQ

Trigonometric Functions of Acute Angles

We can define the trigonometric functions in terms of an angle t and the lengths of the sides of the triangle. The adjacent side (=x) is the side closest to the angle (Adjacent means “next to.”). The opposite side (=y) is the side across from the angle. The hypotenuse (=1) is the side of the triangle opposite the right angle.

Reciprocal Functions: In addition to sine, cosine, and tangent, there are three more functions. These too are defined in terms of the sides of the triangle.

Since, the hypotenuse is the greatest side in a right angle triangle, and  can never be greater than unity and and  can never by less than unity. 

Trigonometric Ratios of some Special Angles