Precalculus
Determine the exact value of the expression using the provided data.
cos 2β where cot β = 4, β lies in quadrant III
Determine the exact value of the trigonometric function using the provided figure.
tan 2β
Simplify the following trigonometric expression.
1 - 2 sin2 (150/2)°
Write the given trigonometric difference as a product.
sin 15x - sin 7x