Sum/Difference & Double Angle Formulas

Front

What is the double angle formula for sine?

Back

Front

What is the double angle formula for cosine?

Back

Front

What is the Pythagorean identity?

Back

Front

How do you express sin(105°) using sum formulas?

Back

Front

What is the value of cos²x + sin²x?

Back

The value of cos²x + sin²x is always equal to 1.

Front

What is the formula for tan(α - β)?

Back

Front

What is the double angle formula for tangent?

Back

Front

How do you find sin(2θ) using cos(θ)?

Back

Front

What is the value of sin(2θ) if cos(θ) = 4/5 and θ is in the fourth quadrant?

Back

Front

What is the sum of angles formula for sine?

Back