91Ó°ÊÓ

An angle measured upward from a horizontal line is called an angle of ___ and an angle measured downward from a horizontal line is called an angle of ___

For Questions 1 through 4, fill in each blank with the appropriate word. On a calculator, the \(\sin ^{-1}, \cos ^{-1}\), and \(\tan ^{-1}\) keys allow us to find an _______ given the _______ of a trigonometric function.

Determine the number of significant digits in each value. a. 374 b. \(0.0374\) c. \(3.7400\) d. 374,000

Add or subtract as indicated. $$ 90^{\circ}-\left(34^{\circ} 12^{\prime}\right) $$

Draw vectors representing the following velocities: \(30 \mathrm{mi} / \mathrm{hr}\) due west

Solve each of the following problems. In each case, be sure to make a diagram of the situation with all the given information labeled. The two equal sides of an isosceles triangle are each 42 centimeters. If the base measures 32 centimeters, find the height and the measure of the two equal angles.

Add or subtract as indicated. $$ 180^{\circ}-\left(132^{\circ} 39^{\prime}\right) $$

Add or subtract as indicated. $$ \left(89^{\circ} 38^{\prime}\right)-\left(28^{\circ} 58^{\prime}\right) $$

How long should an escalator be if it is to make an angle of \(33^{\circ}\) with the floor and carry people a vertical distance of 21 feet between floors?

If a 73.0-foot flagpole casts a shadow \(51.0\) feet long, what is the angle of elevation of the sun (to the nearest tenth of a degree)?