JEE Main & Advanced Sample Paper JEE Main Sample Paper-43

  • question_answer
    In the interval \[\left[ 0,\frac{\pi }{2} \right]\], the equation \[{{\cos }^{2}}x-\cos \,x-x=0\] has

    A)  no solution                              

    B)  exactly one solution

    C)  exactly two solutions                     

    D)  more than two solutions

    Correct Answer: B

    Solution :

     \[\sqrt{2}\,mv\]\[\sqrt{2}\,mv'=(2m)\,v\] From graph there is only solution.

You need to login to perform this action.
You will be redirected in 3 sec spinner