2cos theta = sec theta.. what are they asking me to find?

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2cos theta = sec theta.. what are they asking me to find?

Mathematics
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\[\theta\]
\[2\cos\theta=\sec\theta\]
the exact values of the degree?

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Other answers:

i would think so
on what interval?
0 degree to 360 degree
\[2\cos{\theta}=\sec{\theta} \rightarrow 2\cos{\theta}=\frac{1}{\cos{\theta}}\]then\[2\cos^2{\theta}=1\]
\[\cos{\theta}={\pm}\frac{1}{\sqrt{2}}\]
Find all those angles theta that satisfy this.
θ = 45, 215, 135, 225
itsmesowat.. how'd you get the answers?
use your unit circle or other favorite method to get special angle values for consine...
use the calculator do [2nd] [cos] of the fraction 1/rad(2)
Draw a right-angled triangle with sides 1, 1 and hypotenuse sqrt(2). cos(theta)=1/sqrt(2) when theta = 45 degrees. In the second quadrant, 180-45 = 135 degrees, in the third, 180+45 degrees = 225 and in the fourth, 360-45 = 315 degrees/
gotcha.
you got everything lokisan said? you are a genius!!~~~~
lol tyler.. where'd you get 215 degrees?
215 is typo, should be 225, which is 180+45, reference angle of 135
gotcha.
sorry i suck at typing out math... they should introduce the white board on this haha
lmao. XD
they have these equation thingys. it's built from mathjax
wait. how'd you get 1/sqrt of 2?
2cos^2(theta)=1. Divide both sides by 2, then take the sqrt of both sides.

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