MCQ
Choose the correct option and justify your choice : $\frac{1-\tan^245^\circ}{1+\tan^245^\circ} =$
- A$\tan 90^\circ$
- B$1$
- C$\sin 45^\circ$
- ✓$0$
✓
Answer
Correct option: D.
$0$
$=\frac{1-\tan^245^\circ}{1+\tan^245^\circ}$
$=\frac{1-1}{1+1}=0$
$=\frac{1-1}{1+1}=0$
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