# Tutor profile: Cathy N.

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Cathy N.

Recent Purdue University Graduate

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## Questions

### Subject: Spanish

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Question:

¿Dónde está Pilar?

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Cathy N.

Answer:

Pilar está estudiando en la biblioteca.

### Subject: Pre-Calculus

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Question:

Find sin( 11π/ 6)

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Cathy N.

Answer:

Think of the angles as time on a clock. Where does this angle lie on the clock? What is the reference angle? Using the reference angle of 2π, we get: 2π - 11π/ 6 to be π/6. Since this is in Quadrant IV, the angle of ( 11π/ 6) is actually -sin(π/ 6) which is equal to -1/2.

### Subject: Calculus

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Question:

Find the derivative of y=√(x)+ 8∛x- 2 ∜x

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Cathy N.

Answer:

rewrite the function as: y = x^(1/2) + 8 x^(1/3) - 2 x^(1/4) Now take the derivative: d/dx = 1/2x^(-1/2) + 8/3x^(-2/3) - 1/2x^(-3/4)

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