Mathematics
Senior High

cosθcosπ/3+sinθsinπ/3が1/2cosθ+√3/2sinθになる過程を教えてください

88 加法定理を用いると VS cos(0-)-V3(cos@cos号+sin@sin号)=V3(cos0+sin V3 2 合 sin 0sin -COs 0 + -sin 0 Vア3 -cos0 + イ2 ウ3 -sin0 2 88

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