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sinA + cosA > 1 where A is 0< A < 90 in ABC triangle
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Given that sinA=2/5 and that A is obtuse,find the value of cosA.
👍 0 👎 0 👁 25 asked by Raj yesterday at 4:18am sinA =
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CosA/1+sinA=1-sinA/cosA
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prove that :cosA-sinA+1/cosA+sinA-1=cosecA+cotA
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