Toán Lớp 11: 1. Giải phương trình sau:
a) cos2x+sin^2x+2cosx=0
b) √3.sinx+cosx=2sin(2x+π/4)
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Toán Lớp 11: 1. Giải phương trình sau:
a) cos2x+sin^2x+2cosx=0
b) √3.sinx+cosx=2sin(2x+π/4)
Comments ( 1 )
a)pi/2 +k pi
b)x=-pi/12+k2pi
x= 7pi/36+k2pi/3