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Brandon S.

Math Tutor

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Pre-Calculus

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Question:

Find sin(theta) if cos(theta) = 12/13 and theta is in quadrant 4

Brandon S.

Answer:

sin^2(theta) = 1 - cos^^2(theta) = 1 - (12/13)^2 = 1 - 144/169 = 25/169 so, sin(theta) = -5/13 since theta is in quadrant 4

Calculus

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Question:

Find the derivative of 3x^3-4x+2

Brandon S.

Answer:

9x^2-4

Algebra

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Question:

Find the domain of (x-4) divided by (x-2)(x+2) in interval notation.

Brandon S.

Answer:

(-infinity, -2) U (-2,2) U (2,infinity)

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