To evaluate this expression, we need to use a calculator or some trigonometric identities. However, note that the input for the tangent function is outside of the range of the function, which is between -?/2 and ?/2 radians. Therefore, we can use the periodicity of the tangent function to find an equivalent angle that is within the range.

Since tangent has a period of ? radians, we can add or subtract any multiple of ? to the angle -495 to find an equivalent angle that is between -?/2 and ?/2 radians.

-495 + ? = -495 + 3.1416 ? -491.86

This angle is still outside of the range, so we need to add another ? to get:

-491.86 + ? = -491.86 + 3.1416 ? -488.72

Now we can evaluate the expression:

cos(1140) + tan(-488.72)

Using a calculator, we find that:

cos(1140) ? 0.342 tan(-488.72) ? -19.97

Therefore,

cos(1140) + tan(-495) ? 0.342 - 19.97 ? -19.63

So the final answer is approximately -19.63.