Question

Factorise Fully (sin x)^3-2.25*sin x

Answer 1

first take out sinx

Answer 2

= sin x(sin^2x - 2.25)

Answer 3

something wrong with openstudy..

Answer 4

yes what else ???

Answer 5

try again - the part in the parenthesis is difference of 2 squares - use the identity a^2 - b^2 = (a + b)(a - b) - let a = sin x and b = 1.5

Answer 6

- I can only write 2 lines - openstudy wont allow more!

Answer 7

1.5 because its the square root of 2.25

Answer 8

- just replace a with sin x and b with 1.5 in the formula I posted