91Ó°ÊÓ

Find the amplitude, period, and phase shift of the given function. Then graph one cycle of the function, either by hand or by using Gnuplot (see Appendix B). \(y=-\sin (5 x+3)\)

Find the exact value of the given expression in radians. \(\cos ^{-1}\left(\cos \left(-\frac{\pi}{10}\right)\right)\)

For Exercises 26-33, prove the given identity. \(\cos \left(\sin ^{-1} x\right)=\sqrt{1-x^{2}}\)