In one sentence, describe what the following article is about: While most large companies will run bad checks back through the bank a second time, you probably don't want to incur multiple bank charges for the same check if you are a small business owner or just an individual or organization who is the recipient of a bad check. Contact the person by phone and follow up with an email if you have their address. When you contact the check writer, give him or her a deadline to resolve the problem, usually a week or two. Ask the person to contact you if the deadline isn't convenient and to make arrangements to resolve the issue. If the check writer does not respond within the deadline, send him a letter via certified mail that you will be contacting his local police department, since writing bad checks is considered theft. If you don't hear from the check writer after the first or maybe second contact, ask your attorney to draft a more formal letter and have it delivered via certified mail. Only accept cash from the bad check writer to cover the check and your returned check fee so you don't have to worry about more bank charges if a check bounces again or if you run a credit card. They will handle collections on bad checks for you. Their fees are a legitimate business expense and they take the hassle and embarrassment of dealing with bad check writers out of your hands. You can set up these services so bad checks go directly from your bank to the check recovery service. They will then begin electronic collection of the bad check and send you a report. You usually get 100 percent of the check value and can even get rebates to help you cover your bank charges, depending on your contract with the service. Check recovery service providers include Global Check Recovery, Fiserv, and Check Recovery Systems.
Summary: Contact the check writer directly as soon as a check is returned to you. Keep a record of the date and time you contact the check writer. Subscribe to a check recovery service.

Hold your hands open with your palms facing outward. The near string should be short, just the distance between your two hands. The far string should be very long. Bring your hands close together and use your left thumb to hook the string around itself. Return your left hand to its original position. There should now be a section of string extending from under your right index finger over to your left thumb. Mirror Step 2 using your right hand and the dangling left index string. Return your right hand to its original position, palm still down. The string should now make an X between your hands with a short near string across your index fingers and a long far string across your thumbs. Rotate your wrists so that your palms now face each other. A properly-formed Navajo Opening should be much less angular than Opening A. The nooses will be loose and wide. There should be two parallel strings oriented inward, one connected the index fingers and the other connected the thumbs. Underneath these two strings should be an X formed by two strings connecting the index fingers to the thumbs on opposite hands.
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One-sentence summary -- Drape the string over both your left and right index fingers. Loop your left thumb under the right side of the far index string. Loop your right thumb under the left side of the far index string. Bring your hands apart to even out the string.

Problem: Article: To find the missing angle of a triangle using the cosine rule, you need to know the length of all three sides of the triangle. For example, you might have triangle RST. Side SR is 8 cm long. Side ST is 10 cm long. Side RT is 12 cm long. What is the measurement of angle S? The formula is c2=a2+b22abcosC{\displaystyle c^{2}=a^{2}+b^{2}-2ab\cos {C}}. In this formula, cosC{\displaystyle \cos {C}} equals the cosine of the angle you are trying to find. The variable c{\displaystyle c} equals the side opposite the missing angle. The variables a{\displaystyle a} and b{\displaystyle b} are the lengths of the other two sides. Plug these values into the formula. For example, since side RT is opposite the missing angle, angle S, side RT will equal c{\displaystyle c} in the formula. The other two side lengths will be a{\displaystyle a} and b{\displaystyle b}. It doesn't matter which side is which variable. So, your formula should look like this: 122=82+1022(8)(10)cosC{\displaystyle 12^{2}=8^{2}+10^{2}-2(8)(10)\cos {C}}. You are multiplying 2ab{\displaystyle 2ab} times the cosine of the missing angle, which you don't know yet. So, the variable should remain. For example, 122=82+102160cosC{\displaystyle 12^{2}=8^{2}+10^{2}-160\cos {C}}. Remember that to square a number, you multiply the number by itself. For example, 144=82+102160cosC{\displaystyle 144=8^{2}+10^{2}-160\cos {C}} Make sure you square each number first, and then add them together. For example:144=64+100160cosC{\displaystyle 144=64+100-160\cos {C}}144=164160cosC{\displaystyle 144=164-160\cos {C}} To do this, subtract the sum of a2{\displaystyle a^{2}} and b2{\displaystyle b^{2}} from both sides of the equation. Then, divide each side of the equation by the coefficient of the missing angle's cosine. For example, to isolate the cosine of the missing angle, subtract 164 from both sides of the equation, then divide each side by -160:144164=164164160cosC{\displaystyle 144-164=164-164-160\cos {C}}20=160cosC{\displaystyle -20=-160\cos {C}}20160=160cosC160{\displaystyle {
rac {-20}{-160}}={
rac {-160\cos {C}}{-160}}}0.125=cosC{\displaystyle 0.125=\cos {C}} This will give you the measurement of the missing angle. On a calculator, the inverse cosine key is denoted by COS1{\displaystyle COS^{-1}}. For example, the inverse cosine of .0125 is 82.8192. So, the missing angle, angle S, is 82.8192 degrees.
Summary:
Assess what values you know. Set up the formula for the Cosine Rule. Determine the values of a{\displaystyle a}, b{\displaystyle b}, and c{\displaystyle c}. Complete the necessary multiplication. Find the square of c{\displaystyle c}. Add the squares of a{\displaystyle a} and b{\displaystyle b}. Isolate the cosine of the missing angle. Find the inverse cosine.