If cosA=3/4, then 32 sin (A/2) sin ((5A) /2)= ------------- (A) √11 (B) -√11 (C) 11 (D) -11

If cosA=(3)/(4) and k sin ((A)/(2))sin((5A)/(2))=(11)/(8) . Find k.

sin((-11pi)/3)

Show that (sin 5 A + 2 sin 8A + sin 11 A)/( sin 8A + 2 sin 11 A + sin 14 A) = (sin 8A)/(sin 11 A).

A d d4/(-11)\ a n d7/(11)

Show that ( sin 5A + 2 sin 8A + sin 11A ) /( sin 8 A +2sin 11A + sin 14A ) = (sin 8A)/( sin 11A)

Value of sin (-(11pi )/( 3)) is

If x real and y= (x^2-x+3)/(x+2) , then (A) yge1 (B) yge11 (C) yle-11 (D) -11ltylt1

Image of (1, 2, 3) w.r.t a plane is (-7/3,-4/3,-1/3) then which of the following points lie on the plane (A) (-1,1,-1) (B) (-1,-1,1) (C) (-1,-1,1) (D) (1,1,-1)

(5 1/4-3 1/3) = (a)(12/23) (b) 2 (c) (1 11/12) (d) (11/12)

Prove that tan ((3pi)/11) + 4 sin ((2pi)/11)=sqrt( 11) .