in a triangle ABC if a cos A equal to b cos B show that triangle is either isosceles right angled
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Given a cosA = b cos B
2R Sin A Cos A = 2R Sin B Cos B.
2 Sin A Cos A = 2 Sin B Cos B.
Sin 2A = Sin 2B
2A = 2B
A = B.
An isosceles triangle is a triangle with two equal sides are equal.
2R Sin A Cos A = 2R Sin B Cos B.
2 Sin A Cos A = 2 Sin B Cos B.
Sin 2A = Sin 2B
2A = 2B
A = B.
An isosceles triangle is a triangle with two equal sides are equal.
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Step-by-step explanation:please see this attachment
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