Update ANS: If a⁴+b⁴+c⁴+a²b²=2c²(a²+b²) then show that C=60 or 120 degree | class 11 Trigonometry

3 Jul 2022

If a⁴+b⁴+c⁴+a²b²=2c²(a²+b²) then show that C=60 or 120 degree | class 11 Trigonometry

If a⁴+b⁴+c⁴+a²b²=2c²(a²+b²) then show that C=60 or 120 degree

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