For `theta in (0,pi/4)` which one of the following is largest ?

Which one of the following is the largest ion?

Let theta in [ 0, pi/2] which one of the following is true ?

Which one of the following islands is the largest?

If A= sin^(2)theta + cos^(4)theta , where 0 le theta le pi/2 , then which one of the following is correct ?

If =sec^(2)theta+cos^(2)theta , where 0ltthetalt(pi)/(2) , then which one of the following is correct ?

If sintheta cos theta =k , where 0 le thetale pi/2 , then which one of the following is correct ?

If A=sin^(4) theta+cos^(4) theta , then which one of the followings is correct?

If 0 le theta lt pi/2 and p= ssec^(2)theta then which one of the following is correct ?