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OpenStudy (anonymous):
find all the angles between 0 and 360 degrees for tan2x = cot40. So we have the obvious method, with turning cot40 into a number, but is there any other method?? IB maths HL talking here :P
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hartnn (hartnn):
yup, tan a = cot (90-a) so tan 2x = ?
OpenStudy (anonymous):
so 90 - 2x = 40 ??
hartnn (hartnn):
yup, x= ?
OpenStudy (anonymous):
x = 25. AHHH. MINDBLOWN :P
hartnn (hartnn):
one more solution is there
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hartnn (hartnn):
tan(x+180) = tan x put x= 25 here
OpenStudy (anonymous):
of course, 205.
OpenStudy (anonymous):
hahahahahahah, thank youuu :) you have just saved me from the wrath of my math teacher :P
hartnn (hartnn):
welcome ^_^
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