In Exercises 18 to 20, prove each statement without using a table or a calculator. Draw an appropriate right triangle. 18. If mZR = 45", then tan R = 1. 19. If mZS = 30°, then sin S = . %3D 20. If mZT = 60°, then sin T = .

Q: 8. A man standing 20 ft away from the foot of a tower looks at the top with an angle of elevation of…

A:

Q: 3) Triangle DEF f= 32 ft; e = 29 ft; m<E = 61 deg Find m<F (using Law of Sines) Is another value…

A: We need to find angle F.

Q: A 26-foot extension ladder leaning against a building makes a 78° angle with the ground. How far up…

A:

Q: 7. Given that the distance from A to B is 60 ft, find the distance from B to C. Round to the nearest…

A: We have the given figure as Here distance A to B is 60 ft.

Q: 10. The angle of elevation from a point on the ground to the top of a tower is 50° .If the tower is…

A: It is angle of elevation problem.

Q: Given: sin tan which quadrant does the answer belong?

A: sin-1tan7π6 = ?   ∵ Domain of sin-1x is -1, 1  Range of sin-1x is -π2, π2

Q: 81. The original Ferris wheel, built in Chicago in 1893, completed 4 revolutions in 40 minutes. Find…

A: There are revolutions in Here we have to find the angular speed

Q: 7. What is tan 60° ? a. V3 с. V3 b. 2 d. 2 8. In a right triangle PQR, PQ = 12 cm and QR = 5 cm.…

A: