SOLUTION: In this equation, I am supposed to solve for 't'. {{{ 676 = 84.5*cos ( t*sqrt(385.8/82.5) )}}} I got as far as 8=cos(2.162 t) but I can't get it any farther, and it's possi

Algebra ->  Trigonometry-basics -> SOLUTION: In this equation, I am supposed to solve for 't'. {{{ 676 = 84.5*cos ( t*sqrt(385.8/82.5) )}}} I got as far as 8=cos(2.162 t) but I can't get it any farther, and it's possi      Log On


   



Question 115398: In this equation, I am supposed to solve for 't'.
++676+=+84.5%2Acos+%28+t%2Asqrt%28385.8%2F82.5%29+%29
I got as far as 8=cos(2.162 t) but I can't get it any farther, and it's possible I did it wrong.
Please help?

Answer by Edwin McCravy(20064) About Me  (Show Source):
You can put this solution on YOUR website!
In this equation, I am supposed to solve for 't'.
++676+=+84.5%2Acos+%28+t%2Asqrt%28385.8%2F82.5%29+%29
I got as far as 8=cos%282.162t%29 but I can't get it any farther,
and it's possible I did it wrong.
Please help?
No, you did that exactly right. It's just that there
is no solution to

8=cos%282.162t%29

because the cosine can never be larger than 1 or less than -1.
Thus it certainly cannot be equal to 8.  The equation has no
solution.  Are you sure it was 

676=84.5%2Acos%28t%2Asqrt%28385.8%2F82.5%29++%29?

Edwin