已知角α的终边过P(-3.4),求α的六种三角函数值.x=-3,y=4r=√(x²+y²)=5sin=y/r=-4/5cos=x/r=3/5tan=y/x=-4/3cot=1/tan=-3/4sec=1/cos=5/3csc=1/sin=-5/4y=4,sin应该是4/5吧?
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![已知角α的终边过P(-3.4),求α的六种三角函数值.x=-3,y=4r=√(x²+y²)=5sin=y/r=-4/5cos=x/r=3/5tan=y/x=-4/3cot=1/tan=-3/4sec=1/cos=5/3csc=1/sin=-5/4y=4,sin应该是4/5吧?](/uploads/image/z/13873113-9-3.jpg?t=%E5%B7%B2%E7%9F%A5%E8%A7%92%CE%B1%E7%9A%84%E7%BB%88%E8%BE%B9%E8%BF%87P%EF%BC%88-3.4%EF%BC%89%2C%E6%B1%82%CE%B1%E7%9A%84%E5%85%AD%E7%A7%8D%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%E5%80%BC.x%3D-3%2Cy%3D4r%3D%E2%88%9A%28x%26%23178%3B%2By%26%23178%3B%29%3D5sin%3Dy%2Fr%3D-4%2F5cos%3Dx%2Fr%3D3%2F5tan%3Dy%2Fx%3D-4%2F3cot%3D1%2Ftan%3D-3%2F4sec%3D1%2Fcos%3D5%2F3csc%3D1%2Fsin%3D-5%2F4y%3D4%2Csin%E5%BA%94%E8%AF%A5%E6%98%AF4%2F5%E5%90%A7%3F)
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