यदि tan theta=frac{{cos 9+sin 9}{cos 9-sin 9}} तो theta � – InterviewSolution

1.	यदि tan theta=frac{{cos 9+sin 9}{cos 9-sin 9}} तो theta बताइए?
Answer» cos9°+sin9°/cos9°-sin9°dividing numerator and denominator by cos9°=(cos9°+sin9°)/cos9°/ (cos9°-sin9°)/cos9°=1+tan9°/1-tan9°=tan45°+tan9°/1 - tan45°×tan9°=tan(45°+9°)=tan54°so the answer is tan54°

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