Monday
September 22, 2014

Homework Help: Trig

Posted by does it matter at this point? on Friday, March 7, 2008 at 9:42pm.

Find secx if sinx = -4/5 and 270 < x < 360.

tan^2x+1=sec^2x
(-4/5)^2+1=sec^2x
16/25+1=sec^2x
17/25=sec^2x
sqrt 17/5

I don't know if it should be positive or negative.

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