If 8tanA= 15 then SinA-CosA is equal to
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tan A = 15/8 so tan2A = 225 /64, 1 + tan2A = sec2A = 289 / 64
hence cos2A = 64 / 289, cosA = 8/ 17 and so sinA = 15 /17
so sinA - cos A = 15 / 17 - 8 / 17 = 7 /17
Answer = 7 /17
hence cos2A = 64 / 289, cosA = 8/ 17 and so sinA = 15 /17
so sinA - cos A = 15 / 17 - 8 / 17 = 7 /17
Answer = 7 /17
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