If cos alpha+ cos beta + cos gamma = sin...

If `cos alpha+ cos beta + cos gamma = sin alpha+ sin beta +sin gamma= 0`, then :

`cos 2 alpha+ cos 2 beta + cos2 gamma = 0`

`sin 2 alpha+ sin 2 beta + sin 2 gamma = 0`

` cos (beta +gamma) + cos (gamma +alpha) + cos (alpha +beta) =0`

` sin (beta +gamma) + sin (gamma +alpha) + sin (alpha +beta) =0`.

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MODERN PUBLICATION-LINEAR INEQUATIONS-EXERCISE

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