[" (3) "cos^(2)((pi)/(6)+theta)-sin^(2)((pi)/(6)-theta)=......],[" Af "(1)/(2)cos2 thetaquad " B) "0," C) "-(1)/(2)cos2 theta]

The value of cos^(2)((pi)/(6)+theta)-sin^(2)((pi)/(6)-theta) is (1)/(2)cos2 theta b.0c*-(1)/(2)cos2 theta d.-cot35^(0)

The value of cos^(2)((pi)/(6)+theta)-s in62((pi)/(6)-theta) is a(i)/(2)cos2 theta b.0c.-(1)/(2)cos2 theta d.(1)/(2)

The value of cos^2(pi/6+theta)-sin^2(pi/6-theta) is ............... A) 1/2 cos 2 theta B) 0 C) -1/2 cos 2 theta D) 1/2

4 sin ((pi)/(3) + theta)sin ((pi)/(3)- theta)= .............. A) 1+ cos theta B) 1- 2 cos 2 theta C) 2 cos 2 theta -1 D) 1+ 2 cos 2 theta

The value of cos^2(pi/6+theta)-sin ^2\ (pi/6-theta) is (a)dot 1/2cos\ 2theta (b)dot 0 (c)dot -1/2cos2theta (d). 1/2

If : sin^(2) ((pi)/(4) + (theta)/(2)) - cos^(2) ((pi)/(4) + (theta)/(2))= A) sin theta B) cos theta C) sin 2 theta D) cos 2 theta

The value of cos^2(pi/6+theta)-sin^2\ \ (pi/6-theta) is a, 1/2cos2theta b. 0 c. -1/2cos2theta d. -cot35^0

2cos((pi)/(2)-theta)+3sin((pi)/(2)+theta)-(3sin theta+2cos theta)=

If theta in ((pi)/(2), (3pi)/(2)), then the value of sqrt(4 cos ^(4) theta + sin ^(2) 2 theta) + 4 cot theta cos ^(2) ((pi)/(4) -(theta)/(2)) is .............. A) -2 cot theta B) 2 cot theta C) 2 cos theta D) 2 sin theta

If sin((pi cos theta)/(2))=cos((pi sin theta)/(2)) then cos2 theta can be equal to