Define the sine of an angle θ in a right triangle in terms of its sides.

Sine of θ is the ratio of the length of the opposite leg to the length of the hypotenuse.

Sine, Cosine, And Tangent Ratios Lesson Plan for Grade 11

Name: Sine, Cosine, and Tangent Ratios
Author: Insta~Lesson

I can define sine, cosine, and tangent in terms of right triangle ratios.

1
For a right triangle, the sine of an angle is the ratio of the opposite side to the hypotenuse.
2
SOHCAHTOA is a mnemonic device that helps us remember that sine is opposite over hypotenuse, cosine is adjacent over hypotenuse, and tangent is opposite over adjacent.
3
The cosecant, secant, and cotangent functions are the reciprocals of the sine, cosine, and tangent functions, respectively.