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ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
sec^2x = 1/cos^2x
 2 years ago

ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
8cos^3x=0
 2 years ago

ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
cos(pi/2) = 0
 2 years ago

ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
so 8cos^3(pi/2)=0
 2 years ago

Denebel Group TitleBest ResponseYou've already chosen the best response.0
I got lost on the first step.. Sorry, can you explain it more?
 2 years ago

ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
sure, first you need to memorize all of the identitites memorize : sec(x) = 1/cos(x)
 2 years ago

Jemurray3 Group TitleBest ResponseYou've already chosen the best response.0
whoa whoa whoa, \[8\cos^2(x) = 1\] not zero...
 2 years ago

ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
so sec^2(x) = 1/cos^2(x)
 2 years ago

ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
ah right 1 my bad
 2 years ago

Denebel Group TitleBest ResponseYou've already chosen the best response.0
dw:1329118155688:dw So like this?
 2 years ago

ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
anyway multiply across so 1/cos^2(x) * cos^2(x) = cos^2(x) * 8cos(x)
 2 years ago

ksmith197 Group TitleBest ResponseYou've already chosen the best response.1
1 = 8cos^3(x)
 2 years ago

Denebel Group TitleBest ResponseYou've already chosen the best response.0
Ohh I see. Thank you.
 2 years ago

Denebel Group TitleBest ResponseYou've already chosen the best response.0
So it would be x = pi/3 instead of pi/2 right?
 2 years ago
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