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April 18, 2015

April 18, 2015

Posted by **vikrant** on Wednesday, April 17, 2013 at 8:27am.

- trig -
**Reiny**, Wednesday, April 17, 2013 at 8:42amvalues of cosines lie between -1 and +1

so minimum value of

2cosx + 2cosy

= 2(-1) + 2(-1)

= -4

when both x and y = 3π/2

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