====== Question 7 & 8, Exercise 9.1 ======
Solutions of Question 7 & 8 of Exercise 9.1 of Unit 09: Trigonometric Functions. This is unit of Model Textbook of Mathematics for Class XI published by National Book Foundation (NBF) as Federal Textbook Board, Islamabad, Pakistan. 

=====Question 7=====
Draw the graphs of $y=\operatorname{Sin} x$ and $y=\operatorname{Sin} 2 x$ in $[0,2 \pi]$ on the same scale.

** Solution. **





=====Question 8=====
Draw the graphs of $y=\operatorname{Cos} x$ and $y=\operatorname{Cos} 2 x$ in $[0,2 \pi]$ on the same scale.

** Solution. **





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