Math, asked by 7070266309, 11 months ago

if cos(A-B)= 3 cos(A+B) , then CotACotB is

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Answered by sriram979
14

cosAcosB + sinAsinB=3(cosAcosB-sinAsinB)

cosAcosB+sinBsinA=3cosAcosB-3sinAsinB

2cosAcosB=4sinAsinB

cosAcosB/sinAsinB=4/2

cotAcotB=2

(cosa/ Sina= cotA )

Answered by TEJASRI23
8

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