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If A+B+C=180^(@) , prove that: "tan"2A+ ...

If `A+B+C=180^(@)` , prove that: `"tan"2A+ "tan"2B+"tan" 2C="tan" 2A "tan"2B tan 2C`

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Knowledge Check

  • If A+B + C =180^(@), then tan A + tan B + tan C is equal to

    A
    `tan A tan B tan C`
    B
    ` 2 tan A tan B tan C`
    C
    `-tan A tan B tan C`
    D
    ` 1-4 tan A tan B tan C`

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