A boat observes the top of a cliff to be at an angle of elevation of 25 degrees. The cliff is also at a bearing of W 30 degrees N from the boat. The boat then travels 100 meters in a straight path. The boat then observes the cliff to be due north, with an angle of elevation of 15 degrees. Using this sufficient information, calculate the height of the cliff.
I agree with Charlie. With just a sketch, I arrived at 30.75 meters. Using the law of cosines gave 30.82589347 meters. So, as Charlie said, 30.83 is good.
Posted by CeeAnne
on 2006-06-09 11:37:35