====== Question 9, Exercise 9.1 ======
Solutions of Question 9 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 9(i)=====
Solve graphically: $\sin x=\cos x$

** Solution. **





=====Question 9(ii)=====
Solve graphically: $\cos x=x$

** Solution. **




=====Question 9(iii)=====
Solve graphically: $\sin x=x$

** Solution. **




=====Question 9(iv)=====
Solve graphically: $\tan x=x$

** Solution. **




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