9. In any triangle ABC, prove that ...
Question
Fullscreen

9. In any triangle ABC, prove that cos A + cosB + cos C NIC

JEE/Engineering Exams
Maths
Solution
102
Rating
4.0 (1 ratings)
Fullscreen
since ( C=pi-A-B ), we want to maximize the function: ( f(A, B)=cos (A)+cos (B)+cos (pi-A-B) ) ( f(A, B)=cos (A)+cos (B)-cos (A+B) ) within the region R: ( A+B
Quick and Stepwise Solutions Just click and Send Download App OVER 20 LAKH QUESTIONS ANSWERED Download App for Free