In Exercises 1-8, A is an acute angle. Use a calculator to approximate the measure of A Round to one decimal place.
1. sin A = 0.85
2. tan A = 2.13
3. cos A = 0.87
4. sin A = 0.06
5. cos A = 0.15
6. tan A = 1.05
7. sin A = 0.42
8. tan A = 0.84
Solve the right triangle. Round decimals to the nearest tenth.
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18. Submarine A sonar operator on a ship detects a
submarine at a distance of 400 meters and an angle
of depression of 35°. How deep is the submarine?
19. Height of a Building Two buildings are 60 feet apart across a
street. A person on top of the shorter building finds the angle of
elevation of the roof of the taller building to be 20° and the angle
of depression of its base to be 35°. How tall is the taller building
to the nearest foot?
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