Anonymous

# Math help?

A)Without using a calculator, compute the sine and cosine of 330 degrees by using the reference angle.

B)What is the reference angle___degrees.

C)In what quadrant is this angle? (answer 1, 2 , 3, or 4)

D) sin(330 degrees) = ?

E) cos(330 degrees) =?

### 3 Answers

Relevance

- ?Lv 72 months ago
B. 360 - 330 = 30 << ref. angle

A. Sin 30 = 1/2

sin 330 -- Quad 4 ... sin 330 = - sin 30 = -1/2

cos 30 = (sqrt3) / 2

cos 330 = cos 30 = (sqrt3) / 2

C 330 is in Q4

- rotchmLv 72 months ago
Sketch out your trig circle and locate 330 deg on it. Upload your sketch here and then we will take it from there.

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