

what is the cosine of 370°
370° is greater than 360° so let us subtract 360° 370° − 360° = 10° cos(370°) = cos(10°) = 0.985 (to 3 decimal places)
what is √10?
Let's try 3.5: 3.5 × 3.5 = 12.25 Let's try 3.2: 3.2 × 3.2 = 10.24 Let's try 3.1: 3.1 × 3.1 = 9.61 ... Getting closer to 10, but it will take a long time to get a good answer! calculator At this point, I get out my calculator and it says: 3.1622776601683793319988935444327 But the digits just go on and on, without any pattern. So even the calculator's answer is only an approximation!