作业帮in triangle abc a=12 b=16 and sinB=2/3 what is the measure o
来源：学生作业帮 编辑：拍题作业网作业帮 分类：数学作业 时间：2024/04/30 22:04:24
in triangle abc a=12 b=16 and sinB=2/3 what is the measure of angle A in degrees
还有：
the equation x^2+2ix-4=0 has as its toot
a根号下5-1,-根号下5-1
b根号下5-i,根号下5+i
c根号下3-i,根号下5+i
d根号下3-i,根号下3+i
e根号下3-1,-根号下3-i
还有：
the equation x^2+2ix-4=0 has as its toot
a根号下5-1,-根号下5-1
b根号下5-i,根号下5+i
c根号下3-i,根号下5+i
d根号下3-i,根号下3+i
e根号下3-1,-根号下3-i
第一题：可以用正弦定理得：sinA /a=sinB /b
所以得sinA=1/2,所以angle A=30度
第二题：由韦达定理得：方程根=[（-2i±根号下（4i²+16）]/2=-i±根号下3
所以选e
希望答案能满意.
所以得sinA=1/2,所以angle A=30度
第二题：由韦达定理得：方程根=[（-2i±根号下（4i²+16）]/2=-i±根号下3
所以选e
希望答案能满意.
in triangle abc a=12 b=16 and sinB=2/3 what is the measure o
A triangle has A = 60o,b = 20,and c = 30.What is the measure
Given in the△ABC,a,b,c are three sides of the triangle,and 3
If A=6+9x^2 and B=7+3x,the what is A in terms of
in triangle ABC,AB=AC=2.WHICH of the following could be the
In the figure above,equilateral triangle ABC is inscribed in
英语翻译The legs of right triangle ABC have lengths 3 and 4.What
在锐角三角形abc中,a=2b,为什么sin2b/sinb等于sin2b×cosb/sinb
请翻译As shown in the following diagram,there is a triangle ABC
The roof is a triangle. And there is a（ ）
在三角形ABC中,b*b=4a*a*sinB*sinB 角A等于几度
在三角形ABC中,a+c=2b,A-C=π/3,求sinB