b B Suppose ABC is a right triangle with sides of A lengths a, b, and c and right angle at C. Find the unknown side length using the Pythagorean theorem, and then find the values of the six trigonometric functions for angle B. Rationalize denominators when applicable. b=2, c=5 The unknown side length a is 21 (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize the denominator.) sin B 2 5 (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize the denominator.) cos B= (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize the denominator."