Use excel programming only

3. aw of Cosines a? =b2 + c2-2bc. cos(A) b? =a2 + c2-2ac-cos(B) c2 a2 + b2-2ab-cos(c) Create a spreadsheet that will implement the law of cosines. Inputs are side lengths a, b, and c. Outputs are the measures of angles A, B and C in degrees. Test your spreadsheet using the following: (a) a=10, b-24, c-26 (b) a-25, b-25, C-25 (c) a-9, b=12, c=15