find the exact value of https://www.connexus.com/content/media/666994-2202012-105352-AM-1682839791.gif

Question

anonymous · Answer

the link doesn't work, you have to be a student to get in.

anonymous · Answer

it's cos(-7pi/4 radians)

anonymous · Answer

It's asking me to log into Connexus.

anonymous · Answer

the link just displays cos(-7pi/4 radians)

anonymous · Answer

So you know that 360 degrees, one complete circle, is the same thing as 8pi/4.  So first, add 8pi/4 to what's inside your parentheses.

This just turns it into an angle that's a bit easier to evaluate visually.

So you should get

cos(pi/4)

anonymous · Answer

how do I get cos(pi/4) from 8pi/4 and cos(-7pi/4 radians)

anonymous · Answer

so

cos(-7pi/4) = cos(pi/4)

it's just a different way of writing it.

The only difference is this

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