## anonymous one year ago 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 @chrisdbest

1. chrisdbest

That looks like B

2. anonymous

are you sure

3. chrisdbest

yes

4. anonymous

thanks

5. chrisdbest

6. anonymous

it was wrong

7. DanJS

Think about the values for X and Y in the unit circle, where (x,y) = (cos(theta), sin(theta))

8. DanJS

For B as suggested, Test and see if $\sin(\theta) = \sin(90- \theta)$? are those two Y values the same if you use an angle less than 90 for theta...