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Class VI
Class VII
Class VIII
Class IX
Class X
SSC Grade X - Trigonometry
Question
1
1.
cot
75°
tan
15°
=
0
tan
15°
tan
75°
-1
1
Question
2
2.
Express
sin
θ
in terms of
cot
θ
cot
θ
√
1
+
cot
2
θ
1
√
1
+
cot
2
θ
1
cot
θ
√
1
+
cot
2
θ
√
1
+
cot
2
θ
cot
θ
Question
3
3.
Express
cot
58°
in terms of
sin
58°
sin
58°
√
1
−
sin
2
58°
1
sin
58°
√
1
−
sin
2
58°
1
√
1
−
sin
2
58°
√
1
−
sin
2
58°
sin
58°
Question
4
4.
Which of the following are true?
a)
cos
(
G
+
H
)
=
cos
G
+
cos
H
b)
tan
θ
=
cot
θ
for no value of
θ
c)
tan
(
G
+
H
)
=
tan
G
+
tan
H
d)
The value of
sin
θ
increases as
θ
increases from
0°
to
90°
e)
sin
(
G
+
H
)
=
sin
G
+
sin
H
f)
sin
θ
=
cos
θ
for all
θ
g)
The value of
cos
θ
increases as
θ
increases from
0°
to
90°
{c,e,d}
{a,d}
{f,d}
{d}
{b,d}
Question
5
5.
Express
cos
θ
in terms of
cot
θ
√
1
+
cot
2
θ
1
cot
θ
√
1
+
cot
2
θ
cot
θ
cot
θ
√
1
+
cot
2
θ
1
√
1
+
cot
2
θ
Question
6
6.
If
t
=
cos
θ
+
sin
θ
,
u
=
cos
θ
−
sin
θ
then
(
t
2
+
u
2
)
=
0
(
t
2
+
u
2
)
=
1
(
t
2
+
u
2
)
=
2
(
t
2
−
u
2
)
=
1
(
t
2
−
u
2
)
=
2
Question
7
7.
tan
10°
cot
69°
cot
80°
tan
21°
=
tan
10°
1
-1
0
tan
69°
Question
8
8.
Express
sec
θ
in terms of
cot
θ
1
√
1
+
cot
2
θ
1
cot
θ
√
1
+
cot
2
θ
√
1
+
cot
2
θ
cot
θ
cot
θ
√
1
+
cot
2
θ
Question
9
9.
Given that
4
cosec
θ
=
5
, find
sin
θ
4
5
4
3
3
4
5
3
3
5
Question
10
10.
Given
sin
C
=
2
5
,
find
cos
C
5
21
√
21
5
2
2
21
√
21
1
5
√
21
1
2
√
21
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