Answer:
given cos(2θ) = 1 - 2 sin²(θ)
=> cos(2θ) = 1 - 2(11/61)²
=> cos(2θ) = 1 - 2* 121/3721
=> cos(2θ) = 1 - 242/3721
=> cos(2θ) = 3479/3721
Step-by-step explanation:
