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Sagnik Mukhopadhyay Grade:
        

solve  4 x


sinx+cosx+cosecx+secx+tanx+cotx=-7


 


 

6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

sinx+cosx+secx+cosecx+cotx+tanx=7


 sinx+cosx+1/cosx +sinx/cosx +1/sinx +cosx/sinx=7


sinx+cosx+1+sinx/cosx  +1+cosx/sinx=7


sinx+cosx+1+sinx+cosx/sinxcosx=7


sinx+cosx+2(1+sinx+cosx)/sin2x=7


                                                           (sinx+cosx)square=1+sin2x


 we get


    root(1+sin2x)+2(1+(1+sin2x))/sin2x=7


                                                             put sin2x=t


   we get t=0 on solving


     sin2x=0


    x=npie


 


 


 

6 years ago
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