EXERCISES 42 e given n this sectiond o ve each right triangle ABC (C = 90) 1-20

Question

EXERCISES 42 e given n this sectiond o ve each right triangle ABC (C = 90) 1-20 Round off answers using the guidelines tower that the tower 6. A 19°, a17 ft 8. ? 10.3°, ? 24.5 ft ? 25 ft ,A4,5, a-625 ft 240. 31.2 ft 14. A 10.8, 12. A= 31.5, b= 29.7 ft 88 10,a 49.2 ft 6 1.0ft 18. a 7.00 ft, c 11.0 ft 1.026.0 ft 20. a 5.00 ft, b 4.00 ft 44 solve each problem by making a careful or from the first floor to the second floor of a pxercises 21-44 Eon and using right triangles A and An escaias 50 ft long and makes an angle of 30° with ngind the vertical distance between the floors. floor against the side of a building and makes der isl0g 60? adder lean"with the ground. If the foot of the lad- an an o ft from the building. find the height the ladder f 60 posite on the building. has a uniform elevation of 6°. Find the increase t A road has a uninth 500 yd along the road. in elevation in driving 500 yd alon If the angle of elevation of the sun at a e find the height of a tree that casts a shadow of certain time is 45 ft sit at Cand fnd the width of a river, a surveyor sets up her tran- tand sights across the river to point B(both B ngle x To find the widt at the water's edge, as shown below). She measures off 200 ft from C to A such that C is a angle. If she determines that angle A is 24°, how then wide is the river? th River

Explanation / Answer

21) applying sin rule on the triangle formed by the escalator

sin 30 = d / 50

d = sin 30 * 50

d = 25

vertical distance between the floors is 25 ft

22) applying tan rule on the triangle formed by the ladder

tan 60 = h / 10

h = 10 tan 60

h = 17.32 ft

height of ladder = 17.32 ft

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.