Question

In a right triangle ABC, tan(a)= 20/21.find sin(a) and cos(a)

Answer 1

sin(a)=opposite/hypotenuse
∴hypotenuse=√20²+21²
=√400+441
=√841
=29
∴sin(a)=20/29
=0.6897

cos(a)=adjascent/hypotenuse
=21/29
=0.7241