मराठी

If A, B and C are interior angles of a ΔABC then B + Ccos(B + C2) is equal to ______. -

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प्रश्न

If A, B and C are interior angles of a ΔABC then `cos (("B + C")/2)` is equal to ______.

पर्याय

  • `sin  "A"/2`

  • - `sin  "A"/2`

  • `cos  "A"/2`

  • - `cos  "A"/2`

MCQ
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उत्तर

If A, B and C are interior angles of a ΔABC then `cos (("B + C")/2)` is equal to `underline(sin  "A"/2)`.

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