QuestionSections $4.7+4.8$
Show all work! (1) Find the exact value of each expression. state if undefined. a) $\arccos \left(\frac{1}{2}\right)$ b) $\arcsin (4)$ c) $\sin \left(\arcsin \left(-\frac{1}{2}\right)\right)$ d) $\tan \left(\arccos \left(\frac{3}{7}\right)\right) \quad \begin{array}{l}\text { sketcl this on the } \\ \text { coordinate plane. }\end{array}$ (2) Solve the problem. Use exact values (leave in terms of a trig function. Aski slope is 52 ft long and the angle A ski slope is from the ground to the summit is $42^{\circ}$. How high is the summit? (Draw your best ski slope and mountain) "̈