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Question
(sec 2A + 1) sec2 A = ______.
Options
sec A
2 sec A
sec 2A
2 sec 2A
MCQ
Fill in the Blanks
Solution
(sec 2A + 1) sec2 A = 2 sec 2A.
Explanation:
(sec 2A + 1) sec2 A
= `((1 + tan^2 A)/(1 - tan^2 A) + 1)(1 + tan^2 A)`
= `(2(1 + tan^2 A))/(1 - tan^2 A)`
= 2 sec 2A
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Trigonometric Functions of Triple Angle
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