f(x)=msina+ncosa化簡通式?
f(x)=msina+ncosa化簡通式?
數(shù)學(xué)人氣：740 ℃時(shí)間：2020-10-01 13:52:30
優(yōu)質(zhì)解答
這個(gè)是輔助角公式：f(x)=√m²+n²sin(a+φ) (其中tanφ=n/m)證明：f(x)=√m²+n²(msina/√m²+n²+ncosa/√m²+n²)設(shè)cosφ=m/√m²+n² ,sinφ=n/√m²+n²∴f(...
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