91Ó°ÊÓ

In Exercises 3 and \(4,\) state the form of the Law of Sines used to solve the problem. Give the answer in a form like \(\frac{\sin 72^{\circ}}{6.3}=\frac{\sin 55^{\circ}}{a}\) a) Find \(\beta\) if it is known that \(a=5\) \(b=8,\) and \(\alpha=40^{\circ}\) b) Find \(c\) if it is known that \(a=5.3, \alpha=41^{\circ}\) and \(\gamma=87^{\circ}\) (GRAPH CANT COPY)

Use a scientific calculator to find the indicated cosine ratio to four decimal places. $$\cos 17^{\circ}$$

Use a scientific calculator to find the indicated cosine ratio to four decimal places. $$\cos 82^{\circ}$$

Angle measures should be given to the nearest degree; distances should be given to the nearest tenth of a unit. When her airplane is descending to land, the pilot notes an angle of depression of \(5^{\circ} .\) If the altimeter shows an altitude reading of \(120 \mathrm{ft}\), what is the distance \(x\) from the plane to touchdown? GRAPH CAN'T COPY.