Lessons

Find the sine of an angle in a right triangle
In this lesson you will learn the sine ratio by comparing the ratios of the length of the side opposite an acute angle to the length of the hypotenuse in right triangles.
Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles.
In this lesson you will learn the sine ratio by comparing the ratios of the length of the side opposite an acute angle to the length of the hypotenuse in right triangles.