Q28 of 123 Page 9

Mark the Correct alternative in the following:
If tan x = t then tan 2x + sec 2x is equal to

Given tan x = t

then tan 2x + sex 2x =

[ using the formulae for tan 2x and sec 2x in terms of tan x,

and ]

Now

As already given tan x = t

Hence the answer is option A.

Mark the Correct alternative in the following:

If then cos α =

Mark the Correct alternative in the following:

If (2ⁿ + 1) x = π, then 2ⁿ cos x cos 2x cos2² x ….. cos 2^{n – 1} x =

Mark the Correct alternative in the following:

The value of cos⁴ x + sin⁴ x – 6 cos² x sin² x is

Mark the Correct alternative in the following:

The value of cos (36^o – A) cos (36^o + A) + cos(54^o – A) cos (54^o + A) is

Mark the Correct alternative in the following:If tan x = t then tan 2x + sec 2x is equal to