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Byju's Answer
Standard X
Mathematics
Non-Standard Angles
cos 770∘/sin ...
Question
c
o
s
70
∘
s
i
n
20
∘
+
c
o
s
59
∘
s
i
n
31
∘
−
8
s
i
n
2
30
∘
is equal to
\N
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Solution
The correct option is
A
0.0
c
o
s
70
∘
s
i
n
20
∘
+
c
o
s
59
∘
s
i
n
31
∘
−
8
s
i
n
2
30
∘
⇒
s
i
n
20
∘
s
i
n
20
∘
+
s
i
n
31
∘
s
i
n
31
∘
−
8
(
1
2
)
2
(
∵
c
o
s
θ
=
s
i
n
(
90
∘
−
θ
)
,
s
i
n
30
∘
=
(
1
2
)
⇒
1
+
1
−
8
×
1
4
⇒
2
−
2
=
0
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0
Similar questions
Q.
Find:
c
o
s
70
∘
s
i
n
20
∘
+
c
o
s
59
∘
s
i
n
31
∘
−
8
s
i
n
2
30
∘
=
______.
Q.
Evaluate
c
o
s
70
∘
s
i
n
20
∘
+
c
o
s
59
∘
s
i
n
31
∘
−
8
s
i
n
2
30
∘
=
0
Q.
Find the value of the following expression.
c
o
s
70
∘
s
i
n
20
∘
+
c
o
s
59
∘
s
i
n
31
∘
−
8
s
i
n
2
30
∘
Q.
Find the value of:
cos
70
∘
sin
20
∘
+
cos
59
∘
sin
31
∘
+
cos
θ
sin
(
90
−
θ
)
−
8
cos
2
60
∘
Q.
sin
20
∘
sin
24
∘
sin
48
∘
sin
84
∘
is equal to
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