= DMaths_Hadbook... EQ :actors at P and R have to stand 5m and 4m away from theactor at Q respectively. The angle of elevation of S from Pis 45° and the angle of elevation of S from R is 60°. If thespotlight is placed at a point vertically above PR.60°RP5m4ma) Determine how far the actors at P and R must stand from105each other.b) The actor at P makes his entrance on stage by slidingdown a wire from S to P. How long is the wire that theactor slides along?In the diagram alongside, D is a point vertically above C.DC is y meters in length. The angle of elevation of D fromB is 8. Angle DÂB = a and DBA = B.a) Determine the length of DB in terms y and 8.ysin (a+ B)b) Show that AB =135sin e sin aIn the diagram alongside, C is a point vertically above D.CD is y meters in length. The angle of elevation of C fromB is O and the angle of elevation of C from A is a. AngleADB = B.a) Determine the length of AD in terms y and a.b) Determine the length of BD in terms y and 6.y? sin Bc) Hence, show that the area of AABD =AB2 tan a tan 0Copyright Kevin Smith / Berlut Books CC1287) A telephone cable is to be erected between 2 cliff sides ADand BE. An enginehorizontal plane as the foot of the cliffs. He measures theangle of E from C and D to be 0 and a respectively. CliffDA is y meters in height and C is x meters from the footstandspoint C in the sameDyof cliff BE.a) Show that the length of the telephone cable isx tan 8- ysin ab) If x=1000m, y = 250m and 0 = a = 45°, what is thedistance between the cliffs?Mixed Exercise: (answers on page 352)

Answered: Image /qna-images/answer/c0bb0c49-4c87-4509-b80b-67448ccb2e90.jpg

actors at P and R have to stand 5m and 4m away from the actor at Q respectively. The angle of elevation of S from P is 45° and the angle of elevation of S from R is 60°. If the spotlight is placed at a point vertically above PR. 60 R Pe 5m 4m a) Determine how far the actors at P and R must stand from 105 each other.

actors at P and R have to stand 5m and 4m away from the actor at Q respectively. The angle of elevation of S from P is 45° and the angle of elevation of S from R is 60°. If the spotlight is placed at a point vertically above PR. 60 R Pe 5m 4m a) Determine how far the actors at P and R must stand from 105 each other.

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter3: Triangles

Section3.5: Inequalities In A Triangles

Problem 23E: An auto parts dealer in Huntsville, Alabama at point H, has called a manufacturer for parts needed...

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