Question

sec A + tan a = 3 then sec a equals to how much ​

Answer 1

Answer:

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Formula to be used ::

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=> Sec² A - Tan² A = 1

=> x² - y² = (x+y) (x-y)

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Given

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Sec A + Tan A = 3....... (1)

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So,

Sec² A - Tan² A = 1

Now adding equation (1) and (2) we get,

Sec A + Tan A = 3

+ Sec A - Tan A = ⅓

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2 Sec A = 3 +⅓

or, Sec A = ½ × (9+1)/3 = ½× 10/3

or, Sec A = 5/3 ___answer__

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