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Grade: 11 
        
Find the  minimum value of   this trigonometry solution where A, B, C  are the angles of a triangle
                        (cos A+cos B+ cos C)
 
2 years ago

Answers : (1)

View Solution
sahil
142 Points 
							Sol: Just prove that cos(a)+cos(b)+cos(c)=1+4sin(2a).sin(2b).sin(2c) so when 4sin(2a).sin(2b).sin(2c)=0 minimum value occurs that is 1 so 1=or
2 years ago
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