Prove that `tan^2 x +6 lnsecx +2cos x + 4 > 6 sec x` for `x in (3pi/2,2pi)`.

Prove that tan^(2)x+6ln sec x+2cos x+4>6sec x for x in(3(pi)/(2),2 pi)

Prove that tan^2x+6lns e c x+2cosx+4>6secx for x\ in ((3pi)/2,\ 2pi)dot

Let f (x) = 7 tan ^(8) x + 7 tan ^(6) x - 3 tan ^(4) x - 3 tan ^(2) x for all x in (-(pi)/(2), (pi)/(2)). Then the correct expression(s) is (are).

Provet that "tan "((pi)/(4)+(x)/(2)) = " tan x + sec x "

If f (x) = sqrt(cos ec ^(2) x - 2 sin x cos x - (1)/(tan ^(2) x )) x in ((7pi)/(4), 2pi ) then f' ((11 pi)/(6))=

If f (x) = sqrt(cos ec ^(2) x - 2 sin x cos x - (1)/(tan ^(2) x )) x in ((7pi)/(4), 2pi ) then f' ((11 pi)/(6))=

Prove that cos ^(2) x + cos ^(2) (x + (pi)/(3)) + cos ^(2) (x - (pi)/(3)) = 3/2.

Prove that cos ^(2) x + cos ^(2) (x + (pi)/(3) + cos ^(2) (x - (pi)/(3)) = 3/2.

Prove that cos ^(2) x + cos ^(2) (x + (pi)/(3)) + cos ^(2) (x - (pi)/(3)) = 3/2.