Mathematics
posted by Lungelo masuku .
If cosA is equal to 12/13 where 0 degrees is less than A less than 90 degrees, then tanA is equal to 3/4 where 0 degrees is less than A less than 90 degrees. Determine the ff:
Sin2A

if cosA = 12/13, tanA = 5/12, not 3/4
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