SUM AND DIFFERENCE FORMULA IN TRIGONOMETRY WORKSHEET

Problem 1 :

sin (45^º) cos (15^º) – cos (45^º) sin (15^º)

Problem 2 :

sin (53^º) cos (7^º) + cos (53^º) sin (7^º)

Problem 3 :

Problem 4 :

Problem 5 :

Problem 6 :

Problem 7 :

sin (2A) cos (A) – cos (2A) sin (A)

Problem 8 :

cos (3α) cos (α) + sin (3α) cos (α)

Problem 9 :

Problem 10 :

Answer Key

1) 1/2

2) √3/2

3) cos (19𝜋/90)

4) sin (2𝜋/35)

5) sin (14𝜋/12)

6) -1

7) sin A

8) cos 2α

9) tan 34°

10) 1