Plane TrigonometryAngle of Elevation and Depression and Other Application for Right

Triangles

CE Board – May 2012

From the top of tower A, the angle of elevation of the top of the tower B is 46°. From the foot of tower B the angle of elevation of the top of tower A is 28°. Both towers are on a level ground. If the height of tower B is 120m, how high is tower A in m?

A. 38.6

B. 42.3

C. 44.1

D. 40.7

CE Board – November 2009

From the top of tower A, the angle of elevation of the top of the tower B is 46°. From the foot of tower B the angle of elevation of the top of tower A is 28°. Both towers are on a level ground. If the height of tower B is 120m, how high is tower A in m?

A. 38.6

B. 42.3

C. 44.1

D. 40.7

Probable Board Question

The angle of elevation of a point C from a pint B is 29°42’; the angle of elevation of C from another point A 31.2 m directly below B is 59°23’. How high is C from the horizontal line through A?

A. 47.1 meters

B. 52.3 meters

C. 35.1 meters

D. 66.9 meters

CE Board – November 2003

A rectangular piece of land 40m x 30m is to be crossed diagonally by a 10-m wide roadway. If the land cost P1,500.00 per square meter, the cost of the roadway is:

A. P401.10

B. P60,165.00

C. P601,650.00

D. 651,500.00