根号cos30°-2sin45°+tan45°·cos60°已知x/y=2/3,求3x-y/x+2y的值根号cos30°-2sin45°+tan45°乘以cos60°

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根号cos30°-2sin45°+tan45°·cos60°已知x/y=2/3,求3x-y/x+2y的值根号cos30°-2sin45°+tan45°乘以cos60°根号cos30°-2sin45°+

根号cos30°-2sin45°+tan45°·cos60°已知x/y=2/3,求3x-y/x+2y的值根号cos30°-2sin45°+tan45°乘以cos60°
根号cos30°-2sin45°+tan45°·cos60°
已知x/y=2/3,求3x-y/x+2y的值
根号cos30°-2sin45°+tan45°乘以cos60°

根号cos30°-2sin45°+tan45°·cos60°已知x/y=2/3,求3x-y/x+2y的值根号cos30°-2sin45°+tan45°乘以cos60°
根号【3?】cos30°-2sin45°+tan45°·cos60°
=3/2-根号2+1/2=2-根号2
x/y=2/3,求
3x-y/x+2y=(3x/y-1)/(x/y+2)=(2-1)/(2/3+2)=1/(8/3)=3/8

题目不完整

根号cos30°-2sin45°+tan45°乘以cos60°
=√(√3/2)-2*√2/2+1*1/2
=√(√3/2)-√2+1/2
=0.93060485910209959894121874698323......-1.4142135623730950488016887242097+0.5
=0.016391296729004550139530022773302......