Q18 of 118 Page 5

Mark the correct alternative in the following:
If tan A + cot A = 4, then tan⁴ A + cot⁴ A is equal to

Given: tan A + cot A = 4

⇒

Squaring both sides we get

=194

Mark the correct alternative in the following:

The value of sin² 5° + sin² 10° + sin² 15° + … + sin² 85° + sin² 90° is

Mark the correct alternative in the following:

If x sin 45° cos² 60°, then x =

Mark the correct alternative in the following:

If A lies in second quadrant and 3 tan A + 4 = 0, then the value of 2 cot A − 5 cos A + sin A is equal to

Mark the correct alternative in the following:If tan A + cot A = 4, then tan4 A + cot4 A is equal to