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Zachary Z.
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Pre-Calculus
TutorMe
Question:

Which trigonometric functions are Even Functions?

Zachary Z.
Answer:

Cosine and Secant

Trigonometry
TutorMe
Question:

$$cos(\sqrt3/2)=x$$

Zachary Z.
Answer:

$$x=\pi/3,5\pi/3 $$

Geometry
TutorMe
Question:

Find the circumference of a circular disk whose area is 100 Pi spare centimeters.

Zachary Z.
Answer:

Let r be the radius of the disk. Area equals 100 Pi, therefore 100 Pi = Pi r^2 solve for r r=10 Circumfrence = 2Pi r= 20Pi

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