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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: giải phương trình sin ²35 +sin ²55+tan62/cot28

Toán Lớp 9: giải phương trình sin ²35 +sin ²55+tan62/cot28

Comments ( 2 )

  1. #huy
    sin^2 35^0+sin^2 55^0+(tan62^0)/(cot28^0)
    =sin^2 35+cos^2 35+(cot28^0)/(cot28^0)
    =1+1
    =2
     

  2. \sin^{2}35^0+\sin^{2}55^0+(\tan62^0)/(\cot28^0)
    =\sin^{2}35+\cos^{2}35+(\cot28^0)/(\cot28^0)
    =1+1
    =2
     

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222-9+11+12:2*14+14 = ? ( )

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