Trigonometric equations and identities videos

Intro to arcsine

Intro to arctangent

Domain & range of inverse tangent function

Intro to arccosine

Restricting domains of functions to make them invertible

Using inverse trig functions with a calculator

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

Sine equation algebraic solution set

Cosine equation solution set in an interval

Cosine equation algebraic solution set

Solving cos(θ)=1 and cos(θ)=-1

Interpreting solutions of trigonometric equations

Trig word problem: solving for temperature

Trig angle addition identities

Using the cosine angle addition identity

Using the cosine double-angle identity

Proof of the sine angle addition identity

Proof of the cosine angle addition identity

Proof of the tangent angle sum and difference identities

Finding trig values using angle addition identities

Using trig angle addition identities: finding side lengths

Using trig angle addition identities: manipulating expressions

Using the tangent angle addition identity

Using trigonometric identities

Trig challenge problem: arithmetic progression

Trig challenge problem: area of a triangle

Trig challenge problem: maximum value

Trig challenge problem: area of a hexagon

Trig challenge problem: cosine of angle-sum

Trig challenge problem: system of equations

Trig challenge problem: multiple constraints