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January 27, 2015

January 27, 2015

Posted by **debbie** on Friday, March 4, 2011 at 11:39am.

- trig -
**MathMate**, Friday, March 4, 2011 at 12:11pmGiven point P(9,√19).

r=sqrt(9²+(√19)²)

=sqrt(81+19)

=sqrt(100)

=10

Cos(θ)=9/10=0.9

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