sin60°/cos30°-tan45° “/”是分之的意思sinA=1/2,且∠ A为锐角,则∠A的度数为 在RT△ABC中,∠C=90°,cosA=根号3/2,则sinB的值是tan30° x tan60°+sin²45°+cos²45°SOS求救啊,
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![sin60°/cos30°-tan45° “/”是分之的意思sinA=1/2,且∠ A为锐角,则∠A的度数为 在RT△ABC中,∠C=90°,cosA=根号3/2,则sinB的值是tan30° x tan60°+sin²45°+cos²45°SOS求救啊,](/uploads/image/z/3703127-23-7.jpg?t=sin60%C2%B0%2Fcos30%C2%B0-tan45%C2%B0+%E2%80%9C%2F%E2%80%9D%E6%98%AF%E5%88%86%E4%B9%8B%E7%9A%84%E6%84%8F%E6%80%9DsinA%3D1%2F2%2C%E4%B8%94%E2%88%A0+A%E4%B8%BA%E9%94%90%E8%A7%92%2C%E5%88%99%E2%88%A0A%E7%9A%84%E5%BA%A6%E6%95%B0%E4%B8%BA+%E5%9C%A8RT%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0C%3D90%C2%B0%2CcosA%3D%E6%A0%B9%E5%8F%B73%2F2%2C%E5%88%99sinB%E7%9A%84%E5%80%BC%E6%98%AFtan30%C2%B0+x+tan60%C2%B0%2Bsin%26%23178%3B45%C2%B0%2Bcos%26%23178%3B45%C2%B0SOS%E6%B1%82%E6%95%91%E5%95%8A%2C)
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