In this blogg i will go overrrr chapter 10 section 1 since it was realllyyyyyyy easyy and i actually understood it prettyy well. All we really needed to know in this section was our two formulas and you also had to make sure you knew your trig chart prettyy well toooo.
Formulas: sin(A+-B)=sinAcosB+-cosAsinB
cos(A+-B)=cosAcosB-+sinAcosB
Exampleeeee: Find the exact value of sin75
-sin(45+30)=sin45cos30+cos45sin30
-sin(75)=(squarerootof 2/2)(squarerootof 3/2)+(squarerootof 2/2)(1/2)
-sin(75)=(squarrootof6/4)+(squarerootof 2/4)
-sin(75)=(squarerootof 6)+(squarerootof 2)/4 <-----answerrrrr!
Exampleeeeee: Simplifyyy cos60cos30-sin60sin30
-cos(60+30)
-cos(90)
- 1 <---answerrrr!!!
Well thats myy bloggg for this weekendddddd, hope everyone had a greatt thanksgivingg holidayy!!!! (: (:
No comments:
Post a Comment