The problem of determining angles in a triangle.

[Azmain S. Raiyan]

Suppose the three arms of a triangle are given.

And you got it by using the area formula of arms and using the area formula of the arms and the sine of the angle between.

So i get answer that,
sinA=sin60°.

But the answer is given A=120°.
Any ways to escape from this?

 

[Deleted member 4993]

Suppose the three arms of a triangle are given.

And you got it by using the area formula of arms and using the area formula of the arms and the sine of the angle between.

So i get answer that,
sinA=sin60°.

But the answer is given A=120°.
Any ways to escape from this?

Yes - there could be ways to escape from this. If you want us to catch/correct any mistake/s, we need to see the complete problem & attempted solution.

Please post the EXACT problem and your work (to arrive at sinA=sin60°)