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Question
If A, B and C are interior angles of a ΔABC then `cos (("B + C")/2)` is equal to ______.
Options
`sin "A"/2`
- `sin "A"/2`
`cos "A"/2`
- `cos "A"/2`
MCQ
Fill in the Blanks
Solution
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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