[" X 17."cos^(2)((pi)/(6)+theta)-sin^(2)((pi)/(6)-0)=],[[" (A) "(1)/(2)cos20," (B) "0]]

cos^(2)(""(pi)/(6) + theta ) -sin^(2)""((pi)/(6) - theta ) =

cos^2(pi/6+theta)-sin^2(pi/6-theta)=

The value of cos^(2)((pi)/(6)+theta)-sin^(2)((pi)/(6)-theta) is

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)

Find the value of cos^(2)((pi)/(6) - (theta)/(2)) - sin^(2) ((pi)/(6)+(theta)/(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

Prove that (i) " tan"^(2) .(pi)/(3) + 2cos^(2) .(pi)/(4)+ 3 sec^(2).(pi)/(6)+ 4 cos^(2).(pi)/(2)=8 (ii) " sin ".(pi)/(6) " cos 0 + sin ".(pi)/(4) " cos " .(pi)(4) + " sin " .(pi)/(3) "cos " .(pi)/(6) =(7)/(4) (iii) " 4sin " (pi)/(6) " sin"^(2) (pi)/(3) + 3 " cos " .(pi)/(3) " tan ".(pi)/(4) = " cosec"^(2).(pi)/(2)=4

The number of solutions of the equation cos^(2) (x + (pi)/( 6)) + cos ^(2) x - 2 cos ( + (pi)/( 6)) co ""(pi)/( 6) = sin ^(2) (pi)/( 6) in interval ((-pi)/( 2), (pi)/( 2)) is _____