Sunday

December 21, 2014

December 21, 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.

**Answer this Question**

**Related Questions**

math - how to define arc cosine(cosine x) for -360 deg<x< 360 deg?? a ...

Please help Math - Determine the correct formula for the measures of all angles ...

math - The measure of an interior angle of a regular polygon is 135 degrees. ...

geometry - How would you complete the table? number of sides: 3, 4, 5, 6 measure...

Algebra 2 - The formula A = 180(n-2)/n relates to the measure A of an interior ...

Math - Given: csc = - 17/15 where 270 < 360 cot = -3/4 where 90 < 180 Find...

Trig - I'm confused on how to determine what the end result angles are for a ...

Maths - 1) Simplification (trigonometric ratios of allied angles)? Simplify : i...

Trig (Last URGENT) - sin2x+cosx=0 , [-180,180) = 2sinxcosx+cosx=0 = cosx(2sinx+1...

math - Find the exact value of cos 300 degrees. thanks guys cos 300 = 1/2 = 0....