A=45° হলে 1-tan2A1+tan2A= কত?
A
1
B
12
C
2
Correct Answer:
1 - tan2A / 1 + tan2A = 1 - ( tan450)2/ 1 + ( tan450)2 = 1 - 1 /1 + 1 = 0/2 = 0