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amoodarya
 one year ago
Best ResponseYou've already chosen the best response.1first sin5x sin 3x =1/2{cos(5x+3x)  cos (5x3x)}

sat_chen
 one year ago
Best ResponseYou've already chosen the best response.0how in the gods name did you get that

amoodarya
 one year ago
Best ResponseYou've already chosen the best response.1dw:1359154820627:dw

sat_chen
 one year ago
Best ResponseYou've already chosen the best response.0the only trick we know so far are the trigonometric identities and half angle formula

amoodarya
 one year ago
Best ResponseYou've already chosen the best response.1understand ? i use product to sum formula

sat_chen
 one year ago
Best ResponseYou've already chosen the best response.0ive never seen that format of sum for sine before thanks. is there other ways to do it or is that it

amoodarya
 one year ago
Best ResponseYou've already chosen the best response.1other way is to expand sin 5x ,sin 3x but its harder i send there formula 4 you

sat_chen
 one year ago
Best ResponseYou've already chosen the best response.0i guess ill have to remember the sum rule then :P

sat_chen
 one year ago
Best ResponseYou've already chosen the best response.0the other one you sent is not gonna be much help in the long run probably. thanks a lot though

amoodarya
 one year ago
Best ResponseYou've already chosen the best response.1and 3st way write sin5x=sin4x+x and sin 3x=sin4xx so you have conjugate union if expand them it is easier than 2nd way (that i said)
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