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prove that cos130°cos140°-sin130°sin140° and give the solution

prove that cos130°cos140°-sin130°sin140° and give the solution
 

Grade:8

2 Answers

Vikas Amritiya
askIITians Faculty 238 Points
one year ago
Dear student please find attachment below 
Here is detailed solution of your doubts
keep asking ypur doubts
Askiitians faculty
Dear student please find attachment below 
Here is detailed solution of your doubts
keep asking ypur doubts
Askiitians faculty
James M. Mason
38 Points
one month ago
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