1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard XII
Mathematics
Factorization Method Form to Remove Indeterminate Form
The value of ...
Question
The value of
sin
2
5
π
12
-
sin
2
π
12
is
(a)
1
2
(b)
3
2
(c) 1
(d) 0
Open in App
Solution
(b)
3
2
5
π
12
=
75
°
,
π
12
=
15
°
sin
2
75
°
-
sin
2
15
°
=
sin
2
75
°
-
cos
2
75
°
sin
90
°
-
θ
=
cos
θ
Now
,
sin
75
°
=
sin
(
45
°
+
30
°
)
=
sin
45
°
cos
30
°
+
cos
45
°
sin
30
°
=
1
2
×
3
2
+
1
2
×
1
2
=
3
+
1
2
2
cos
75
°
=
cos
(
45
°
+
30
°
)
=
cos
45
°
cos
30
°
-
sin
45
°
sin
30
°
=
1
2
×
3
2
-
1
2
×
1
2
=
3
-
1
2
2
Hence
,
sin
2
75
°
-
cos
2
75
°
=
3
+
1
2
2
2
-
3
-
1
2
2
2
=
3
+
1
+
2
3
-
3
-
1
+
2
3
8
=
4
3
8
=
3
2
Suggest Corrections
0
Similar questions
Q.
The value of sin
2
75° − sin
2
15° is
(a)
1
2
(b)
3
2
(c) 1
(d) 0
Q.
The value of
cos
3
20
°
-
cos
3
70
°
sin
3
70
°
-
sin
3
20
°
is
(a)
1
2
(b)
1
2
(c) 1
(d) 2