Science:Math Exam Resources/Courses/MATH102/December 2013/Question A 02/Statement

Which of the following gives a value of $\cos (\arcsin \left(\frac{\sqrt{9-x^2}}{3}\right))$ ?

(a) $\frac{3}{x}$

(b) $\frac{x}{3}$

(c) $\frac{\sqrt{9-x^2}}{x}$

(d) $\frac{x}{\sqrt{9-x^2}}$

(e) $\frac{3}{\sqrt{9-x^2}}$