Asked by Bob

If possible find a solution to 2 cos(theta)=-0612.
theta=
Answered by Steve
if you really mean 0612, then no.

Otherwise, it is always possible to solve

2cos(x) = n
if |n/2| <= 1
Answered by Bob
That doesnt really help me solve for theta
Answered by Steve
well, in that case, as you have written it, there is no solution. There is no θ such that

cosθ = -306

If you can figure out what you really meant, learn about the 2nd function for the cos button on your calculator, and the arccos(θ) or cos<sup>-1</sup>θ function
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