A=45° হলে, (1-tan2A)/(1+tan2A)= কত?

A    1

B    1/2

C    0

D    2

Solution

Correct Answer: Option C

 

tan45° = 1;

(1-tan2A)/(1+tan2A)

= (1-1)/ (1+1)

=0

 

 

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