Welcome back! Hope you had a wonderful winter break!
And here we go! Getting close to the end of trigonometry. Today's lesson could be looked at as one tiny skill where we apply some formulas, or as a day where we apply just about everything from last semester except graphs of trig functions.
That last thing. That's what it is.
We created a notes sheet with formulas (showing derivations of the formulas) for double angle, half angle, and power reducing formulas.
I pointed out that these "formulas" are just trig identities that happen to be useful for something specific.
After lunch, we looked at problems from section 5.5 where you have to apply these formulas... creating notes to help with homework.
More important: we realized that half of the large acute angle in a 7-24-25 is the smallest angle in a 3-4-5. This allows us to take some shortcuts on the homework.
HW #1 (time to work in class): pp 388-9: 7-10, 21-24, 41-44, 74-75. Show work. You might want to change your notebook to a loose-leaf small binder where you can mix handouts and textbook work.
Don't forget that you can access answers on calcchat.com and find videos of some problems by using phone over textbook to link to video.
Finals were viewed and questions asked by those who took the final.
Attached: my work on HW #1. Formula sheet. Notes. Illustration of half angle of 7-24-25.
And here we go! Getting close to the end of trigonometry. Today's lesson could be looked at as one tiny skill where we apply some formulas, or as a day where we apply just about everything from last semester except graphs of trig functions.
That last thing. That's what it is.
We created a notes sheet with formulas (showing derivations of the formulas) for double angle, half angle, and power reducing formulas.
I pointed out that these "formulas" are just trig identities that happen to be useful for something specific.
After lunch, we looked at problems from section 5.5 where you have to apply these formulas... creating notes to help with homework.
More important: we realized that half of the large acute angle in a 7-24-25 is the smallest angle in a 3-4-5. This allows us to take some shortcuts on the homework.
HW #1 (time to work in class): pp 388-9: 7-10, 21-24, 41-44, 74-75. Show work. You might want to change your notebook to a loose-leaf small binder where you can mix handouts and textbook work.
Don't forget that you can access answers on calcchat.com and find videos of some problems by using phone over textbook to link to video.
Finals were viewed and questions asked by those who took the final.
Attached: my work on HW #1. Formula sheet. Notes. Illustration of half angle of 7-24-25.
|
|
|
|