Final answer:
The true equations are sin(27) = x/15, cos(63) = y/15, and sin(63) = x/15.
Step-by-step explanation:
The true equations in this case are:
- sin(27) = x/15
- cos(63) = y/15
- sin(63) = x/15
These equations correspond to the trigonometric functions of 27 and 63 degrees, where x and y are variables. The equations represent the relationships between the sides of a right triangle and the angles, as defined by the trigonometric functions.