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

Toán Lớp 11: tan ( 2x + pi/3 ). tan( pi- x/2 ) =1

Toán Lớp 11: tan ( 2x + pi/3 ). tan( pi- x/2 ) =1

Comments ( 1 )

  1. ĐK: tự tìm
    tan(2x+π/3).tan(π-x/2)=1$\\$<=>tan(2x+π/3)=cot(π-x/2)$\\$<=>tan(2x+π/3)=tan(x/2-π/2)$\\$<=>2x+π/3=x/2-π/2+kπ$\\$<=>3x=(-5π)/6+kπ$\\$<=>x=(-5π)/(9)+(2kπ)/3(kinZZ)

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

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