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What is the period of the function 
g(x)=2cos(7x+5)+1?
Give an exact value.
units

What is the period of the function g(x)=2cos(7x+5)+1? g(x)=2 \cos (7 x+5)+1 ? \newlineGive an exact value.\newlineunits

Full solution

Q. What is the period of the function g(x)=2cos(7x+5)+1? g(x)=2 \cos (7 x+5)+1 ? \newlineGive an exact value.\newlineunits
  1. Identify basic form and coefficient: Identify the basic form of the cosine function and the coefficient of xx within the argument of the cosine function.\newlineThe basic form of a cosine function is cos(Bx)\cos(Bx), where BB affects the period of the function.\newlineIn g(x)=2cos(7x+5)+1g(x)=2\cos(7x+5)+1, the coefficient of xx is 77.
  2. Recall formula for period: Recall the formula for the period of a cosine function.\newlineThe period of a cosine function is given by the formula P=2π/BP = 2\pi/B, where BB is the coefficient of xx in the argument of the cosine function.
  3. Calculate period using coefficient: Calculate the period using the coefficient B=7B=7.\newlineSubstitute B=7B=7 into the formula P=2πBP = \frac{2\pi}{B} to find the period.\newlineP=2π7P = \frac{2\pi}{7}
  4. Check for mathematical errors: Check for any mathematical errors in the calculation.\newlineThe calculation P=2π7 P = \frac{2\pi}{7} is correct and there are no mathematical errors.

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