PROVE THAT sin3Asin6A+sinAsin2A/sin3Acos6A+sinAcos2A

sinAsin2A+sin3Asin6A+sin4Asin13A/sinAcos2A+sin3Acos6A+sin4Acos13A = tan9A

If A + B + C = 180° prove that Sin2A + sin2B – sin2C = 4cosAcosBsinC

If A + B + C = 180° prove that cos2A + cos2B – cos2C = -1 -4cosAcosBcosC

SinAsin2A+sin3Asin6A/sinAcos2A+sin3Acos6A

Prove L=L

Prove that (a^2+b^2)x^2 + 2 = 0 has no real roots if a is not equal to b

Prove that ; 0⁰C =F-32/1.8

how do you prove something to be true

Asked by VALENTINE