Question 29858
What is the exact value of
sin square pi/ 6 - 2sin pi/ 6 cos pi/ 6 
...............=cos square (-pi/6)?...WHAT IS THIS EQUAL TO ??
=(1/2)^2-2*(1/2)*(SQRT 3)/2=1/4 - SQRT(3)/2={2-SQRT(3)}/2 

I got 2-Sqrt3/2 CORRECT .BUT PUT BRACKET ..OTHERWISE IT MAY BE TAKEN AS
 2 -(SQRTRT 3)/2
RHS = cos square (-pi/6)?...= {SQRT(3)/2}^2 = 3/4