Use the Half-angle Formulas to find the exact value of the trigonometric function sin 75°. ..... Which Half-angle Formula should be used to find sin 75°? Select the correct choice below and fill in the answer box to complete your choice. 1- sin 1- cos O A. sin 75° = B. sin 75° = 2 2 1+ cos 1+ sin O C. sin 75° = - O D. sin 75° = 2 2 1- sin 1- cos O E. sin 75° O F. sin 75°: = - 1+ cos 1+ sin O G. sin 75° = O H. sin 75° = - 2 2