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Step by step help?
Ok, so think of theta as a variable
if theta was an 'x' how would you solve?
to be honest I have no clue.
2 cos theta=1 cos theta=1/2 theta=cos inverse(1/2) theta=60degrees
ok, so i would divide 2 from both sides?
Now, you know cos theta equals 1/2..now you want to find theta, do you know how?
oh! okay and would I just look for cos (x) value on the unit circle right?
Umm, you could do that. But im not sure if you would have the unit circle with you on your tests.
There is another way to do it, if you have a graphing calc or if you memorized the cos and sin values of the major degrees on the circle.
well no lol my precal teacher was trying to explain how to but I couldn't understand
Ohh, ok. Well try to memorize the major degrees..like 30, 60, 45, 90, 180, 270, 360.
But if you were to use your unit circle, you would look for the degrees with a cos (x value) of 1/2
ok, so would i use ALL of the radian values of cos 1/2?
do you know the cos and sin values of the angles I drew?
Yes, all of the values, bc the problem says find ALL
I know most of them
thank you so much, you've been a lot of help
so the solutions would be pi/3 and 5pi/3?