So this past week we didn't learn anything new. We basically just reviewed chapter 10 and took a chapter test. I tried my best to catch on to this chapter but i felt horrible all week. So here's some examples.

EXAMPLE 1:
sin75 degrees cos 15 degrees+cos 75 degrees sin 15 degrees
first you must replace it with a formula!
sin(alpha+beta)
sin (75+15)
=sin 90 degrees
TRIG CHART!
your answer is 1.

EXAMPLE 2:
cos 5pi/12 cos pi/12-sin 5pi/12 sin pi/12
replace formula!
cos(alpha+beta)
cos(5pi/12+pi/12)
cos 6pi/12
=1/2
TRIG CHART!
your answer is pi/3.