Identify the triangle that contains an acute angle for which the sine and cosine ratios are equal. Triangle A B C has angle measures 50 degrees, 40 degrees, and 90 degrees. Triangle A B C has angle measures 45 degrees, 45 degrees, 90 degrees. The lengths of sides A C and C B are congruent. Triangle A B C has angle measures 68 degrees, 22 degrees, and 90 degrees. Triangle A B C has angle measures 60 degrees, 30 degrees, and 90 degrees.