Khan Academy

Tangent identities: symmetry (K-A)

Trig values of special angles (K-A)

Finding trig values using angle addition identities (K-A)

Proof of the cosine angle addition identity (K-A)

Proof of the sine angle addition identity (K-A)

Review of trig angle addition identities (K-A)

Using the cosine angle addition identity (K-A)

Using the cosine double-angle identity (K-A)

Proof of the law of cosines (K-A)

Proof of the law of sines (K-A)

Solving for a side with the law of cosines (K-A)

Solving for a side with the law of sines (K-A)

Solving for an angle with the law of cosines (K-A)

Solving for an angle with the law of sines (K-A)

Trig word problem: stars (K-A)

Domain & range of inverse tangent function (K-A)

Intro to arccosine (K-A)

Intro to arcsine (K-A)

Intro to arctangent (K-A)

Restricting domains of functions to make them invertible (K-A)

Solving cos(θ)=1 and cos(θ)=-1 (K-A)

Solving sinusoidal equations of the form sin(x)=d (K-A)

Trig word problem: solving for temperature (K-A)

Using inverse trig functions with a calculator (K-A)

Coin flipping probability (K-A)