Identify the equation as either an identity or not.tan θ + cot θ = 2 csc 2θ

Find the reference angle for θ. 

Solve the triangle if possible. Approximate values to the nearest tenth when appropriate.

Convert the angle from radian measure to degree measure. Round to the nearest hundredth of a degree when appropriate.

What is the exact value of the expression

Find the amplitude and period of

Solve.Consider the formula 

Use a double angle identity to evaluate the the expression

Decide whether the equation is or is not an identity.sin (α + β) + sin (α – β) = 2 sin α cos β

Find the length of the arc intercepted by a central angle of