Answer :

Consider cos 81° - sin 9° = cos 81° - sin (90 - 81)°

= cos 81° - cos 81°


= 0


Hence, proved.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Choose the correcRS Aggarwal - Mathematics

ProveRS Aggarwal - Mathematics