Q27 of 153 Page 7

(sec A + tan A) (1 − sin A) =

To find: (sec A + tan A) (1 − sin A)

Consider (sec A + tan A) (1 − sin A)


We know that




∵ (a + b) (a – b) = a2 – b2


∴


Also, sin2 A + cos2 A = 1 ⇒ 1 – sin2 A = cos2 A


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