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will give brainliest instantly for a quick answer please, thank you.

in ABCΔ, cos A =

i. - (cos B + cos C)
ii. cos B - cos C
iii. cos B + C
iv. - cos (B + C)
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will give brainliest instantly for a quick answer please thank youin ABCΔ cos A i cos B cos C ii cos B cos C iii cos B Civ cos B C class=

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