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Question:

Choose the correct option and justify your choice:
(1 - tan²45°)/(1 + tan²45°)

tan90°

sin45°

1

0

Solution:

The correct option is D: 0

The value of (1 - tan²45°)/(1 + tan²45°) = (1 - (1)²)/(1 + (1)²) = (1 - 1)/(1 + 1) = 0/2 = 0