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October 31, 2014

October 31, 2014

Posted by **nathisikhona** on Thursday, May 23, 2013 at 12:57am.

- math,science -
**drwls**, Thursday, May 23, 2013 at 2:33amcosa = -0.6

a = 126.87 degrees or 233.13 degrees

Your requirement that 180<a<360 degrees requires you to pick the second value for a.

Now calculate 3tana + 25sin^2a

I get 4 + 16 = 20.

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