At a horizontal distance of 43 meters from the base of a tower, the angle of elevation to the top is 70 degrees. find the line of sight distance to the nearest meter.

I don't have a calculator with me right now but for this you need to remember SOH CAH TOA. So cos70 = 43m / H, in which case H is the hypotenuse (or line of sight). Next, you need to isolate the variable so you will multiply H to both sides, then divide cos70, giving you H = 43m / cos70. Plug this into your calculator to get the correct answer.

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle