Answer: first option, the values of sin Θ and cos Θ represent the legs of a right triagle with hypotenuse of 1; therefore, solving for cos Θ finds the unknown leg, and then all other trigonometric values can be found.
Step-by-step explanation:
Θ is the angle, and sinΘ and cosΘ are the legs of the right triagle so the second and third option are discarded because they say that sinΘ and cosΘ are angles.
The hypotenuse is 1 because it is an absolute value, i.e. it has not sign (it cannot be negative), which discards the fourth option.