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cos(pi.3^(x))-2cos^(2)(pi.3^(x))+2cos(4p...

`cos(pi.3^(x))-2cos^(2)(pi.3^(x))+2cos(4pi.3^(x))-cos(7pi.3^(x))`
`=sin(pi.3^(x))+2sin^(2)(pi.3^(x))-2sin(4pi.3^(x))+2sin(pi.3^(x+1))-sin(7pi.3^(x))` को हल कीजिए।

लिखित उत्तर

Verified by Experts

The correct Answer is:
`x=log_(3)((2k)/(3)-(1)/(6)), k in N; x =log_(3)((n)/(2)), n in N; x =log_(3)((1)/(8)+(m)/(2)), m in N cup {0}`
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