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anonymous
 4 years ago
How do I solve 8cos x = (sec x)^2?
anonymous
 4 years ago
How do I solve 8cos x = (sec x)^2?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I got lost on the first step.. Sorry, can you explain it more?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0sure, first you need to memorize all of the identitites memorize : sec(x) = 1/cos(x)

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

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so sec^2(x) = 1/cos^2(x)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1329118155688:dw So like this?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0anyway multiply across so 1/cos^2(x) * cos^2(x) = cos^2(x) * 8cos(x)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Ohh I see. Thank you.

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