Prove that Cosh3x=4cosh²x -3coshx
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put value of x=0°
we get 1=4-3
Thus L.H.S = R.H.S
Vasu0142:
yeah btw what do u study ....?
10 completed
ohh which board...?
ssc
Maharashtra?
ts
Telangana
okay.....
hmm
hi
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it is correct it asked my matth miss
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yes its correct but it takes much time to solve
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