A = 45° হলে, (1 - tan2A)/(1 + tan2A) = কত?

A

1/2

B

2


C

1

D

0

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সমাধান: 

(1 - tan2A)/(1 + tan2A) 

= {1 - (tan45°)2}/{1 + (tan45°)2} 

= {1 - (1)2}/{1 + (1)2} 

= (1 - 1)/(1 + 1) 

= 0/2 

= 0 

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Updated: 1 month ago

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