Can anyone solve this question? Don't need a detailed walk through, just a solution. (picture attached)

Question

anonymous · Answer

attachment

cwrw238 · Answer

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cwrw238 · Answer

use the cosine rule
6^2 = 19^2 + 24^2 - 2*19*24*cos A

where A is the required angle

cwrw238 · Answer

rearranging:

cos A =  6^2 - 19^2 - 24^2
             -----------------
                     2*19*24

anonymous · Answer

Could you show me the rest? I kinda need a refresher as to how the whole thing works.

cwrw238 · Answer

ok - you can use your calculator to work out the right hand side
the result will be the cosine of the angle
your calculator can then be used to find the angle A
the key to be used is usually cos-1

cwrw238 · Answer

i used the cosine rule  which is 
a^2  =  b^2 - c^2 - 2bc cos C:
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