Prove that, for a scalene AABC, C COs A + cos B= 4sin ? 2 ,...
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Prove that, for a scalene AABC, C COs A + cos B= 4sin ? 2 а, с, b are in AP. %3| Prove that, for a scalene AABC, C COs A + cos B= 4sin ? 2 а, с, b are in AP. %3|
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