सिद्ध कीजिए : (i) (sin 5theta +sin 3the...

सिद्ध कीजिए : ` (i) (sin 5theta +sin 3theta )/( cos 5theta+sin 3theta )= tan 4theta `
` (sin 7theta +sin 5theta +sin 9theta +sin 3theta )/( cos 7theta + cos 5theta + cos 9theta +cos 3theta )=tan 6theta .`

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