Question
What is the value of (1 - sin A)/(1 + Sin A) given that
tan A = 5/12 and 0° ≤ A ≤ 90°.Solution
We know tan A = (opposite side)/(adjacent side) = 5/12
Therefore by applying Pythagoras theorem hypotenuse = 13
Sin A = 5/13
(1-sinA)/(1+SinA) = (1-5/13)/ (1+5/13) = 8/18 = 4/9
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