Question

if a = 2 cos square theta + sin to the power 4 theta prove that 3 by 4 less than equal to a less than one for all theta​

Answer 1

Step-by-step explanation:

consider this,cos^2 theta=3/4, when theta=30

if sin^4theta is taken as adrsctionsl value then A is still greater than it equal to 3/4 and as A is theta is atleast 30 or 60 the second condition also holds true