Question

Which statement is true? A. In any right triangle, the sine of one acute angle is equal to the cosine of the other acute angle. B. In any right triangle, the sine of one acute angle is equal to the sine of its complementary angle. C. In any right triangle, the cosine of one acute angle is equal to the cosine of its complementary angle. D. In any right triangle, the sum of the sine of one acute angle and the cosine of the other acute angle is 1.

Answer 1

That would be choice 2. One acute angle is the complement of the other

eg in a 90-60-30 triangle sine 30 = cos 60

Answer 2

The correct answer is B. In any right triangle, the sine of one acute angle is equal to the sine of its complementary angle.