17x CSC 12 to tivaluate the expression without using a calculator. 17% e. Which half-angle formula should be used to evaluate the expression csc 12 17% The half-angle formula should be used to evaluate the expression csc 12 17% f. Choose the correct formula below used to evaluate the expression csc and complete the expression in the numerator of the expression under the (Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression.) OA. (17m) 12 CSC 12 OB. 17 CSC 12