How do you do 2300 as a percent decimal and a fraction

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

In triangle abc, angle c is a right angle. find the value of the trig function indicated. find tan a if c = 17 and a = 8

What is the slope of a line that is perpendicular to the line shown on the graph? –4 4