Solve the above que no. 55

Let , we proceed to prove the trigonometric expression by trigonometric identity:

1) Given

2)  

3)    

4)    

5)

6)    

7) Result

Step-by-step explanation:

Let , we proceed to prove the trigonometric expression by trigonometric identity:

1) Given

2)  

3)    

4)    

5)

6)    

7) Result