What Is Right Triangle Trigonometry? - Expii

Common Core suggests: "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.".

Right Triangle Trig Extended to Circles with a Model

Using Unit Circle to Find Sine, Cosine, and Tangent - Expii

Find Sin, Cos, Tan from Lengths of Triangle Sides - Expii

Find Sin, Cos, Tan from Lengths of Triangle Sides - Expii

Right Triangle Trigonometry

The Right Triangle Trig Functions (Clip)

Triangle Area in Terms of Base and Height - Expii

The Right Triangle Trig Functions (Clip)

Find Sin, Cos, Tan from Lengths of Triangle Sides - Expii

Lesson 13-1: Right Triangle Trigonometry

Trigonometry: Angle Sum and Difference Identities - Expii

Right Triangle Trigonometry - Basics of Right Triangle Trigonometry

Find Measures of Angles Using Sin, Cos, Tan - Expii