What it is the quadratic formula ?

Evaluate cos2θ for cosθ = square root of 3/2

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

Fast! find the length of cu. the triangles are similar. show your work.