Question 1177811
(-3 + 4cos^2 x) / (1 - 2sinx) = (a + bsinx) 



(-3+4(1-sin^2x))/ (1-2sinx)

((1-4sin^2x)/(1-2sinx)

(1+2sinx)(1-2sinx))/(1-2sinx)

1+2sinx = a+bsinx

comparing 

a=1, b=2