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- Jun 2nd 2009, 10:47 AM #1

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- Jun 2009
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## What is the value of cos(pi + 301pi/2)

I have to make a video explaining this problem, sent by the person who hired me, but it doesn't appear to be correct.

What is the value of cos( + 301/2)?

A.-1/2

B. 1

C. 0

D. 1/2

E 3/2

This is the solution given:

cos(+301/2) = cos(+75*2+ /2)= cos(+ /2)

= 0

Ans: C

When I use degrees = radians * 180/pi, that answer isn't correct. And when I plug in the original cos (pi+301pi/2) into google calculator, it isn't 0.

Am I missing something?

- Jun 2nd 2009, 11:01 AM #2

- Jun 2nd 2009, 11:26 AM #3

- Jun 2nd 2009, 11:28 AM #4

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- Jun 2009
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- Jun 2nd 2009, 11:59 AM #5