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प्रश्न
Choose the correct alternative:
`(sin("A" - "B"))/(cos"A" cos"B") + (sin("B" - "C"))/(cos"B" cos"C") + (sin("C" - "A"))/(cos"C" cos"A")` is
विकल्प
sin A + sin B + sin C
1
0
cos A + cos B + cos C
उत्तर
0
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