To unload hollow blocks from a cargo truck a wooden plank whose end rests against the truck’s flat-form 1.5 meters above the ground is used. If it is inclined 37 degrees 49 minutes with the ground, how long is the wooden plank?

Answer 1

1.5/x = sin 37°49'
so now just solve for x

Answer 2

Mr. Abad is beside a Santol tree S which is directly west of a Mango tree M. He walks straight to the point A 63.6 meters North, and finds that angle SMA is 51 degrees 36 minutes.

Answer 3

Mr. Abad is beside a Santol tree S which is directly west of a Mango tree M. He walks straight to the point A 63.6 meters North, and finds that angle SMA is 51 degrees 36 minutes.
a) What is the distance between the two trees?
b) How far is he from the Mango tree at his second position?

Answer 4

The Sibago Island lighthouse in Zamboanga stands on a rock 163.4 meters above sea level. A man in a vinta 151.6 meters away from the vertical axis of the light house, observes that the angle of elevation of the top of the lighthouse is 51 degrees 7 minutes. How tall is the light house?

Answer 5

Review your basic trig functions.
For the Mango tree,
AS/SM = tanM
AS/AM = sinM

If the lighthouse has height h, then
(163.4+h)/151.6 = tan51°7'