Use only Sin rule and Cos rule for a triangle to proof this>>>>>>>

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- July 16th 2013, 06:42 AMsrirahulanSin Rule
Use only Sin rule and Cos rule for a triangle to proof this>>>>>>>

- July 16th 2013, 07:30 AMProve ItRe: Sin Rule
What have you tried so far?

- July 16th 2013, 04:28 PMSorobanRe: Sin Rule
Hello, srirahulan!

We need this identity: .

Quote:

. .

From the Sine Rule:. . . .

Square both sides:. . . .

Apply the identity:.

. . . . . . . . . . . . .

Therefore: . .