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suraj Grade: 11
        
sin(A+B+C)=sinAcosBcosC+cosAsinBcosC+cosAcosBsinC-sinAsinBsinC  prow that
why
 
one year ago

Answers : (1)

imran
55 Points
										
Hi SURAJ
let us
       given that sin(A+B+C)
that implise to sin(A+B)*cosC+cos(A+B)*sinC
then sinA*cosB*cosC+cosA*sinB*cosC+cosA*cosB*sinC-sinA*sinB*sinC
               therefore hence proved
        that simple thing that involved in this is sin(A+B)=sinA*cosB+cosA*sinB
                                                                                          and
                                                                          cos(A+B)=cosA*cosB-sinA*sinB
                                    kk THANK Q
one year ago
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