Trigonometry › Cosine

Teacher info ▼

Along with sine, cosine is a fundamental trig function

CCSS.MATH.CONTENT.HSG.SRT.C.6
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.

LTI launch URL (help)
https://schoolyourself.org/page/lti/sy/trigonometry/cosine

Browse lessons