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
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