HAPPY HALLOWEEN EVERYONE :D
This week we didn’t really learn anything new. We reviewed and took our Chapter tests on Chapter 10. In 10-3 we were given double and half angle formulas. I would type all the formulas out, but I honestly don’t feel like it. Everyone should have them in their binders or even better, KNOW THEM by now.

EXAMPLE 1: 2sin30 degrees cos30 degrees
A). According to our formulas, this is the right side of the sin 2 alpha formula.
B). So, replace it with the left – sin 2(30 degrees)
C). Your answer is sin 60 degrees which is in your trig chart.
D). It reduces to square root of 3 / 2.

EXAMPLE 2: cos squared 15 degrees – sin squared 15 degrees
A). According to our formulas, this is the right side of the cos 2 alpha formula.
B). So, replace it with the left – cos 2(15 degrees)
C). Your answer is cos 30 degrees which is in your trig chart.
D). It reduces to squre root of 3 / 2.

Have a great weekenddddd!