If `8cos2theta+8sec2theta=65`,`0ltthetaltpi/2`, then the value of `4cos4theta` is equal to

If 8 cos 2theta+8sec2theta=65 , 0<(theta)<(pi/2) then the value of 4 cos 4theta is equal to

If 8 cos 2 theta + 8 sec 2 theta = 65, 0 lt theta lt (pi)/(2) , then the value of 4 cos 4 theta is equal to a) (-23)/(8) b) (-31)/(8) c) (-31)/(32) d) (-33)/(32)

IF 8 cos 2 theta + 8 sec 2 theta = 65 , 0 lt (pi)/(2) , then the value of 4 cos 4 theta is equal to

If 8 cos 2 theta + 8 sec 2theta = 65, 0 lt theta lt (pi)/(2) then the value of 4 cos 4 theta is

If 8cos2theta+8sec2theta=65and0^(@)ltthetalt(pi)/(2) , then 4cos4theta is equal to

If 8cos^(2)theta+8sec^(2)theta=65 and 0^(@)

If tan9theta=3/4 (where 0ltthetaltpi/18 )then the value of (3cosec 3theta-4sec3theta) is equal to

If cos theta + sec theta = 2 ( 0^@ letheta le 90^@) , then the value of cos 10 theta + sec 11 theta is

If 5cos2theta+2"cos"^(2)(theta)/(2)+1=0 , when (0ltthetaltpi) , then the values of theta are

If 5cos2theta+2"cos"^(2)(theta)/(2)+1=0 , when (0ltthetaltpi) , then the values of theta are