if 0<x<90 Find the value of 4tanX+9cotX

#Trigonometry

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jayashankarkunchala 26th Aug, 2020

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Answer (1)

Ayush Pandey 26th Aug, 2020

Hello,

Use AM>=GM formula so as to solve your question

(4tanx+9cotx)/2>=√(4tanx9cotx)

(4tanx+9cotx)>=2√(4tanx9cotx)

(4tanx+9cotx)>=2√(4*9)

4tanx+9cotx>=12

Hope that helps;

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