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CDS Model Paper 1 Mathematics
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© examsnet.com
Question : 49
Total: 100
If
A
=
sin
2
θ
+
cos
4
θ
, for any value of
θ
, then the value of A is
1
≤
A
≤
2
3
4
≤
A
≤
2
13
16
≤
A
≤
1
3
4
≤
A
≤
13
16
Validate
Solution:
When
θ
=
0
°
sin
2
θ
+
cos
4
θ
=
1
When
θ
=
45
°
,
sin
2
θ
+
cos
4
θ
=
1
2
+
1
4
=
3
4
When
θ
=
30
°
sin
2
θ
+
cos
4
θ
=
1
4
+
9
16
=
13
16
© examsnet.com
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