shuntyevansqueenaD
shuntyevansqueenaD shuntyevansqueenaD
  • 02-09-2016
  • Mathematics
contestada

sec x - 2=0
x=?

a. 7pi/6
b. pi/4
c. 5pi/6
d. 5pi/3
e. 7pi/4

Respuesta :

meerkat18
meerkat18 meerkat18
  • 08-09-2016
we are given the function sec x - 2 = 0 and is asked to solve for x. In this case, we all know that secant is the inverse of cosine. Hence, the expression becomes cos x = 1/2. x then in degrees is equal to 60 degrees. In radians, this is equal to pi/3. cos is also positive in the fourth quadrant which means the answer is d. 5 pi/3. 
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