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    • if 0<x<90 Find the value of 4tanX+9cotX
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    #Trigonometry
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    if 0
    jayashankarkunchala 26th Aug, 2020
    Answer

    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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