Use the first five terms of the trigonometric series to approximate the value of cos- 4x/7to four decimal places. Then compare the approximation to the actual value.
-0.9609, -0.9659
-0.2224, -0.2225
-0.9649,-0.9659
-0.9568, -0.9659

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^

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