Jika sin^(-1) x + sin^(-1)y + sin^(-1)z =?, maka buktikan bahwa x?1-y^2 + y?1-x^2 = z.
Misal sin^(-1) x = a, sin^(-1)y = b, sin^(-1)z = c.
a+b+c=.
x✓1-y^2 + y✓1-x^2
= sin a cos b + cos a sin b
= sin (a + b)
= sin (π – c)
= z
10
Jika sin^(-1) x + sin^(-1)y + sin^(-1)z =?, maka buktikan bahwa x?1-y^2 + y?1-x^2 = z.
Misal sin^(-1) x = a, sin^(-1)y = b, sin^(-1)z = c.
a+b+c=.
x✓1-y^2 + y✓1-x^2
= sin a cos b + cos a sin b
= sin (a + b)
= sin (π – c)
= z