关于三角函数的两个问题1.sin^2(a/2)+cos^2(a/2)+cos^2(a/2)*cos^2(a/2) 这道题目要怎样化解成csc^2(a/2) 2.sinp[(7π/2)-a]-cos(5π-a)-tan(a-6π)-cot[a+(9π/2)]
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![关于三角函数的两个问题1.sin^2(a/2)+cos^2(a/2)+cos^2(a/2)*cos^2(a/2) 这道题目要怎样化解成csc^2(a/2) 2.sinp[(7π/2)-a]-cos(5π-a)-tan(a-6π)-cot[a+(9π/2)]](/uploads/image/z/12413048-32-8.jpg?t=%E5%85%B3%E4%BA%8E%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%E7%9A%84%E4%B8%A4%E4%B8%AA%E9%97%AE%E9%A2%981.sin%5E2%28a%2F2%29%2Bcos%5E2%28a%2F2%29%2Bcos%5E2%28a%2F2%29%2Acos%5E2%28a%2F2%29+%E8%BF%99%E9%81%93%E9%A2%98%E7%9B%AE%E8%A6%81%E6%80%8E%E6%A0%B7%E5%8C%96%E8%A7%A3%E6%88%90csc%5E2%28a%2F2%29+2.sinp%5B%287%CF%80%2F2%29-a%5D-cos%285%CF%80-a%29-tan%28a-6%CF%80%29-cot%5Ba%2B%289%CF%80%2F2%29%5D)
关于三角函数的两个问题1.sin^2(a/2)+cos^2(a/2)+cos^2(a/2)*cos^2(a/2) 这道题目要怎样化解成csc^2(a/2) 2.sinp[(7π/2)-a]-cos(5π-a)-tan(a-6π)-cot[a+(9π/2)]
关于三角函数的两个问题
1.sin^2(a/2)+cos^2(a/2)+cos^2(a/2)*cos^2(a/2)
这道题目要怎样化解成csc^2(a/2)
2.sinp[(7π/2)-a]-cos(5π-a)-tan(a-6π)-cot[a+(9π/2)]
关于三角函数的两个问题1.sin^2(a/2)+cos^2(a/2)+cos^2(a/2)*cos^2(a/2) 这道题目要怎样化解成csc^2(a/2) 2.sinp[(7π/2)-a]-cos(5π-a)-tan(a-6π)-cot[a+(9π/2)]
cos^2(a/2)*cos^2(a/2) 这是两个余弦相乘吗?
2)原式=-cosa+cosa-tana+tana=0
csc的函数还是第一次见
1.cos^2(a/2)*cos^2(a/2)?
难道是cos^4(a/2)?
2.原式=-sin[(1π/2)+a]-cos(π-a)-tan a-cot[a+(π/2)]
=-cos a+cos a-tan a+tan a
=0