To the nearest degree, what is the measure of the second smallest angle in a right triangle with sides 5, 12 and 13?
A
23
B
45
C
47
D
67
Correct Answer: 67
আমরা জানি, Sinθ = লম্বঅতিভুজ = 1213⇒ θ = Sin - 1(1313) = 67.38°.:. A = 67