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prove that:

tan(45 + 2A) = [(1 + sinA)/(1 - sinA)]1/2 = tanA + secA

5 years ago


Answers : (1)


Dear student,

Use the equalities:
tan(a) = sin(a)/cos(a)
sin^2(a) + cos^2(a) = 1 and you should be fine.


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Sagar Singh

B.Tech, IIT Delhi

5 years ago

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