SOLUTION: QUICK!
Could someone help me with this question.
Solve {{{cos2x=sqrt(2)/2}}} in an algebaic manner and state the general solutions.
Best regards in advance...
Algebra ->
Trigonometry-basics
-> SOLUTION: QUICK!
Could someone help me with this question.
Solve {{{cos2x=sqrt(2)/2}}} in an algebaic manner and state the general solutions.
Best regards in advance...
Log On
Cos (45) = cos (135) =
So x = 22.5 degrees or x = 67.5 degrees.
The Cos function is periodic so these values will repeat every 360 degrees
so x = 22.5 + 360n where n is any integer
or
so x = 67.5 + 360n where n is any integer