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godorovg
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Okay here is the deal, I am studying to test out of two math classes, I need someone to show step by step how to Sum of products in trig and Cos laws I have problems this not a the test. i am only studying. I will be attending IU east online this summer studying math. Please show me how to do it not give me answers only thanks.
 one year ago
 one year ago
godorovg Group Title
Okay here is the deal, I am studying to test out of two math classes, I need someone to show step by step how to Sum of products in trig and Cos laws I have problems this not a the test. i am only studying. I will be attending IU east online this summer studying math. Please show me how to do it not give me answers only thanks.
 one year ago
 one year ago

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godorovg Group TitleBest ResponseYou've already chosen the best response.1
here is the problem cos6x+cos2x=0
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
sin2xcos2xcos2x=0
 one year ago

inkyvoyd Group TitleBest ResponseYou've already chosen the best response.0
two tips that are meant as general self study guidelines: sign up for a free account on wolfram alpha, and use stepbystep solution after entering equations. Use resources such as Khan Academy, Purple Math (I believe), Wikipedia, and SOS math (I believe). I think paul's online math notes has good info too. Note that I have given you 7ish names and no links  trust me, these worked for me, especially the first, if you do not have openstudy to help you. Good luck, and have fun!
 one year ago

calmat01 Group TitleBest ResponseYou've already chosen the best response.0
Youtube also has some good math videos. Just type in sum and difference trig identity and you should find what you are you looking for.
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
I know you plug in for this I am just not how?
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
so we use this form in cosucosv=1/2{cosuv)+cos(u+v0} so now we plug in?
 one year ago

calmat01 Group TitleBest ResponseYou've already chosen the best response.0
Cos u+Cos v =2Cos((u+v)/2)Cos((uv)/2)
 one year ago

calmat01 Group TitleBest ResponseYou've already chosen the best response.0
So now just make the appropriate substitutions for u and v.
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
when plugging in for U and v does the 1/2 mean a power?
 one year ago

calmat01 Group TitleBest ResponseYou've already chosen the best response.0
No, it's multiplying the sum and difference of the two angles by 1/2.
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
cosucosv=1/2 cos 6x+cos2x=0
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
is this right so far?
 one year ago

calmat01 Group TitleBest ResponseYou've already chosen the best response.0
Actually, it should be 2cos4xcos2x=0
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
okay that is what I need help with?
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
1/2 of 6 is only 3??
 one year ago

calmat01 Group TitleBest ResponseYou've already chosen the best response.0
Sum of 6x and 2x is 8x divided by 2 is 4x. Difference of 6x and 2x is 4x divided by 2 is 2x.
 one year ago

calmat01 Group TitleBest ResponseYou've already chosen the best response.0
You do not take halfe of each angle you take half of their sum and then half of their difference.
 one year ago

godorovg Group TitleBest ResponseYou've already chosen the best response.1
so you add 6+2= 8 and than divide the sums by 2?
 one year ago

calmat01 Group TitleBest ResponseYou've already chosen the best response.0
Yes, and then you do it again only use their difference.
 one year ago
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