i6seShersHugen i6seShersHugen

19-11-2016
Mathematics

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What is the exact value of sec(-405degress)?? ...?

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syed514 syed514

20-11-2016

sec= 1/(cos), you can add or subtract 360 degrees from any angle measurement without changing the value of any of the trig functions i.e. 405 degrees= 405-360=45. cos of 45 is sqrt(2)/2 so sec405= 2/sqrroot2

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