Hi can we talk about anything yes or no

Triangle xyz has vertices x(1,3), y(0,0)

Find the value of x. give reasons to justify your solutions! c ∈ ae

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