# Help in making sketch or diagrams please

• Jan 30th 2010, 04:55 PM
sherwin156
Help in making sketch or diagrams please
A 40-cm long pendulum is moved 45 degrees from the vertical. How far did the tip of the pendulum rise?

A television antenna is situated atop a hill. From a point 200 m from the base of the cliff, the angle of elevation of the top of the antenna is 80 degrees. The angle of elevation of the bottom of the antenna from the same point is 75 degrees. How tall is the antenna?

Can some1 help me to sketch dis problems? i just nid the drawing please. nid help.. thx in advance
• Jan 30th 2010, 05:05 PM
Prove It
Quote:

Originally Posted by sherwin156
A 40-cm long pendulum is moved 45 degrees from the vertical. How far did the tip of the pendulum rise?

A television antenna is situated atop a hill. From a point 200 m from the base of the cliff, the angle of elevation of the top of the antenna is 80 degrees. The angle of elevation of the bottom of the antenna from the same point is 75 degrees. How tall is the antenna?

Can some1 help me to sketch dis problems? i just nid the drawing please. nid help.. thx in advance

1. Draw the pendulum in the two positions you have specified.

You will be able to create an isosceles triangle using the two positions of the pendulum and the distance between them. You can use the Cosine Rule to work out the distance between them.

Then you can create a Right Angle Triangle using the distance you have just found as the Hypotenuse, and the other two sides as the distance travelled vertically and horizontally.