Given:
To find:
The exact value of cos 15°.
Solution:
Using half-angle identity:
Using the trigonometric identity:
Let us first solve the fraction in the numerator.
Using fraction rule:
Apply radical rule:
Using :
Graphs
°°°°°°°°°°°°°°°°
Answer:
The answer is A.......
and the question is...
Step-by-step explanation:
Answer: 7
7