11th Class
Mathematics
Sample Paper
Maths Olympiad Model Paper-8
question_answer
Let \[\cos \,(\alpha +\beta )=\frac{4}{5}\] and let \[sin\,(\alpha -\beta )=\frac{5}{13},\] where \[0\le \alpha ,\beta \le \frac{\pi }{4}\].Then tan \[2\alpha \] is equal to