7.2E: Right Triangle Trigonometry (Exercises)
( \newcommand{\kernel}{\mathrm{null}\,}\)
For the following exercises, use side lengths to evaluate.
17. cosπ4
18. cotπ3
19. tanπ6
20. cos(π2)=sin(⟶∘)
21. csc(18∘)=sec(⟶∘)
For the following exercises, use the given information to find the lengths of the other two sides of the right triangle.
22. cosB=35,a=6
23. tanA=59,b=6
For the following exercises, use Figure 1 to evaluate each trigonometric function.

24. sinA
25. tanB
For the following exercises, solve for the unknown sides of the given triangle.
26.
27.
28. A 15-ft ladder leans against a building so that the angle between the ground and the ladder is 70∘. How high does the ladder reach up the side of the building? Find the answer to four decimal places.
29. The angle of elevation to the top of a building in Baltimore is found to be 4 degrees from the ground at a distance of 1 mile from the base of the building. Using this information, find the height of the building. Find the answer to four decimal places.