Number 2 (algebra 2)

See attachment below and find the equivalent of tan(∠qsr)

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

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319