quarta-feira, 9 de maio de 2012

May 15th

TRIGONOMETRY
 We´ve studied the basics and we are now solving right-angled triangles (right triangles in American English). Here it´s one resolved example:
 
And a couple of exercises, from our old friend, the BBC Bitesize (by the way, on those exercises, "sf" stands for significant figures).

Now you have a chance to practice:
1. An activity.
2. A first test.

Angles of elevation and depression
Those two concepts are going to appear very often in Trigonometry problems. Here it's an explanation:







And now a couple of example problems:




Have a look now at this video about how useful is Trigonometry for airplane pilots:
Proposed problems

EXTRA!
Remember the trig ratio definitions singing: