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Question
Mathematics
Value of 1+cos56°+cos58°-cos66° is
Q. Value of
1
+
cos
5
6
∘
+
cos
5
8
∘
−
cos
6
6
∘
is
1678
263
Odisha JEE
Odisha JEE 2009
Trigonometric Functions
Report Error
A
2
s
in
2
8
∘
cos
2
9
∘
s
in
3
3
∘
B
4
cos
2
8
∘
s
in
2
9
∘
s
in
3
3
∘
C
4
cos
2
8
∘
cos
2
9
∘
cos
3
3
∘
D
2
cos
2
8
∘
s
in
2
9
∘
s
in
3
3
∘
Solution:
Correct answer is (b)
4
cos
2
8
∘
s
in
2
9
∘
s
in
3
3
∘