Today´s class we started by correcting the homework. It was pag.422 #8-26 all (about angles of elevation and depression). Mrs Saatkamp correct some of them in the board.
After correcting the homework we started a new lesson: 8-5:
Sine rule (Law of sines):
This rule is based on that a triangle (no right triangle), we have to find the legs, angles...we have to use cos, sin and tan, but because is not a right triangle then we cannot use it. So to use sin, cos and tan, we have to draw an altitude, and is then when we get a 90 degrees angle. After that it´s just normal work with sin, cos and tan.
*Mrs Saatkamp, i don´t know what is happening with the images from geogebra but i cannot post any. It says that it´s an internal problem and that i have to try later. So mrs, if you want I can send you the images or whatever you want.
Formula:
Proof:
After that we did 2 exercises to practice, but because I don´t know what is happening with the pictures that I cannot post the images. But the exercises were based on the sine rule, like to find missing information, or a determinate leg...
our homework for tomorrow is pag 429 #10-26 even +27
see ya guys!
*Mrs Saatkamp again, sorry for the images!
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