已知锐角a满足cos(π/3+a)=-1/2,求sina,cosa的值
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![已知锐角a满足cos(π/3+a)=-1/2,求sina,cosa的值](/uploads/image/z/3742364-20-4.jpg?t=%E5%B7%B2%E7%9F%A5%E9%94%90%E8%A7%92a%E6%BB%A1%E8%B6%B3cos%28%CF%80%2F3%2Ba%29%3D-1%2F2%2C%E6%B1%82sina%2Ccosa%E7%9A%84%E5%80%BC)
已知锐角a满足cos(π/3+a)=-1/2,求sina,cosa的值
已知锐角a满足cos(π/3+a)=-1/2,求sina,cosa的值
已知锐角a满足cos(π/3+a)=-1/2,求sina,cosa的值
cos(π/3+a)=-1/2
a为锐角,则π/3+a在第二象限,π/3+a=2π/3
得:a=π/3
所以,sina=√3/2,cosa=1/2