Use identities to find values of the sine and cosine functions of the function for the angle measure. 20, given sin 0 = 7 and cos 0 > 0 cos 20 = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) sin 20 = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)