Prove the following results: Solve the following:

sin^-1xsin^-12x= π/3

2

Prove the following results:

2

Prove the following results:

3

Prove the following results: Solve the following:

cos^-1x+sin^-1x/1-π/6=0

1

If cos^–1 x/2 + cos^–1y/3 = a, then prove that 9x²–12xy cos a + 4y² = 36 sin² a.