2 find the length of a square If its area is 169cm²​

Which value is not a solution of 8x^3 – 1 = 0

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

The longer leg of a 30-60-90 trangle is 18