作业帮根号3sinx+cosx=?
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根号3sinx+cosx=?
根号3sinx+cosx=?
根号3sinx+cosx=?
√3sinx+cosx
=2[(√3/2)sinx+(1/2)cosx]
=2sin(x+π/6)
√3sinx+cosx
=2(√3/2*sinx+1/2*cosx)
=2(cosπ/6*sinx+sinπ/6*cosx)
=2sin(x+π/6)
或
√3sinx+cosx
=2(√3/2*sinx+1/2*cosx)
=2(sinπ/3*sinx+cosπ/3*cosx)
=2cos(x-π/3)
0.5sin(x+30)