If 3 + cos²θ= 3(cot²θ + Sin²θ), 0°<θ<90°, then what is the value of (cosθ +2sinθ)?

If tan A=n tan B and Sin A= m Sin B, then the value of Cos²A is

If θθ, then the value of θθ is:

If Tan⁴x – Tan²x=1 then the value of Sin⁴x + Sin²x is__

If 4sin² θ – 1 = 0 and angle θ is less than 90⁰. The value of cos² θ + tan² θ is:
(Take 0⁰ < θ < 90⁰) 

The value of is:

If then find the value of .

Which of the following simplification value of ?