Use the quadratic formula to solve for x.
2x^2 - x - 9 = 0
(If there is more than one solution, separate them with commas.)
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Find the exact value of sin(2pi/3) .
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Find sin2x , cos2x , and tan2x if cosx = 5/13 and x terminates in quadrant I .
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Find the difference quotient f(x+h) - f(x)/h , where h cannot equal 0 , for the function below.
f(x) = 3x^2 + 5
Simplify your answer as much as possible.
2x^2 - x - 9 = 0
(If there is more than one solution, separate them with commas.)
---------------------
Find the exact value of sin(2pi/3) .
----------------
Find sin2x , cos2x , and tan2x if cosx = 5/13 and x terminates in quadrant I .
------------------------------
Find the difference quotient f(x+h) - f(x)/h , where h cannot equal 0 , for the function below.
f(x) = 3x^2 + 5
Simplify your answer as much as possible.