IIT JEE APPLICATION OF DERIVATIVES If in a triangle `A B C ,` the side `c` and the angle `C` rem...

262 views · Published 21 September 2017 · 2:57 · Indexed 22 September 2026

Channel: Doubtnut · 2017 · Education

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This is the Solution of question from Cengage Publication Math Book Calculus Chapter 6 APPLICATION OF DERIVATIVES written By G. Tewani. You can Find Solution of all math questions from CENGAGE BOOK on our app DOUBTNUT for free. Download Doubtnut from - https://doubtnut.app.link/l5loZfYxxR

If in a triangle `A B C ,`
the side `c`
and the angle `C`
remain constant, while the remaining elements are changed slightly,
 show that
`(d a)/(cosA)+(d b)/(cosB)=0.`

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