OP=√(3+m^2),
sinA=m/OP=√2/4,
∴16m^2=2(3+m^2),
14m^2=6
m^2=3/7,
m=√(3/7)=√21/7(取正).
∴tanA=m/(-√3)=-√7/7.
已知角A的終邊經(jīng)過點P(-根號3,M)且SINA=根號2/4,求TANA的值
已知角A的終邊經(jīng)過點P(-根號3,M)且SINA=根號2/4,求TANA的值
數(shù)學(xué)人氣：321 ℃時間：2019-12-25 02:44:56
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