find the value of
cos 15degree

Answers
Answered by
6
Answer:
cos15
∘
=cos(45
∘
−30
∘
)
=cos45
∘
cos30
∘
+sin45
∘
sin30
∘
=
2
1
×
2
3
+
2
1
×
2
1
=
2
2
3
+1
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