Suppose the radius of a circle is \color{purple}{8}8start color purple, 8, end color purple units. What is its circumference?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

Does 9q + 7 also equal 7 + 9q ? (simplifying algebraic expressions)

Which of the following is a correct equation based on the triangle shown?