We can use the Pythagorean identity to solve for cosθ:
sin^2θ + cos^2θ = 1
Plugging in sinθ = 11/61, we get:
(11/61)^2 + cos^2θ = 1
Simplifying and solving for cosθ, we get:
cosθ = ±sqrt(1 – (11/61)^2)
cosθ = ±(60/61)
Since we are given that θ is in the first quadrant (sinθ is positive), we can take the positive value:
cosθ = 60/61
Therefore, the value of cosθ is 60/61.