Thursday

April 2, 2015

April 2, 2015

Posted by **edward** on Thursday, September 20, 2012 at 11:16am.

- mathematics -
**Steve**, Thursday, September 20, 2012 at 12:43pmwe know that a/sinA = b/sinB

if acosA = bcosB, then

a/cosB = b/cosA

b = acosA/cosB

b = asinB/sinA

so, acosA/cosB = asinB/sinA

cosAsinA = sinBcosB

sin2A = sin2B

means A=B and the triangle is isoceles

**Answer this Question**

**Related Questions**

maths-urgently needed - If in a triangle ABC, c(a+b) Cos B/2 =b(c+a) Cos C/2 ...

maths-urgently needed - If in a triangle ABC, c(a+b) Cos B/2 =b(c+a) Cos C/2 ...

maths-urgently needed - If in a triangle ABC, c(a+b) Cos B/2 =b(c+a) Cos C/2 ...

Math (Geometry) - The perimeter of right triangle ABC is equal to the perimeter ...

math - B . . . . . . . . . . . . . . C A Triangle ABC is right angled at A. The...

Math(Geometry) - In the diagram below(no diagram but details will be provided), ...

Math - From the vertex A of a right angled triangle ABC, (A being the right ...

math - The vertices of a triangle are listed below. H(-2,4), I(22,4), J(10,-1) ...

Math - Can someone please check to see if I answered these true and false ...

9th grade - given that a(-1,8) ,b(2,4) and if the line y=4 is the axis of ...