Which trigonometric function has the same value as sin 75? cos 75 cos 15 sin 15 tan 75

For this case what you should do is find the value of each of the functions and compare it with the value of sin 75.
 The function that has the same value of sin 75 is cos 15
 sin 75 = cos 15 = 0.97
 Also by trigonometry you can find the answer.
 Notice that 90-75 = 15, therefore, sin 75 = cos 15
 answer
 cos 15