EduSahara™ Assignment
Name : Trigonometric Expression Evaluation
Chapter : Trigonometrical Ratios
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
cos
90°
sec
60°
sin
90°
+
sin
60°
sin
45°
tan
30°
=
(i)
1
12
√
18
(ii)
3
2
(iii)
1
12
4
√
18
(iv)
1
12
√
16
(v)
1
12
√
20
Question
2
2.
cos
90°
cosec
60°
sin
0°
−
sec
60°
sin
45°
cot
90°
sin
90°
tan
30°
cot
30°
−
sec
30°
cot
90°
cos
60°
=
(i)
(
−
1
)
(ii)
2
(iii)
1
(iv)
(
−
2
)
(v)
0
Question
3
3.
sin
55°
cos
35°
=
(i)
0
(ii)
tan
55°
(iii)
1
(iv)
tan
35°
(v)
-1
Question
4
4.
cos
72°
sin
18°
=
(i)
tan
18°
(ii)
-1
(iii)
0
(iv)
tan
72°
(v)
1
Question
5
5.
tan
60°
cot
30°
=
(i)
tan
30°
(ii)
-1
(iii)
0
(iv)
1
(v)
tan
60°
Question
6
6.
cot
73°
tan
17°
=
(i)
-1
(ii)
tan
17°
(iii)
1
(iv)
0
(v)
tan
73°
Question
7
7.
sec
8°
cosec
82°
=
(i)
1
(ii)
tan
8°
(iii)
tan
82°
(iv)
-1
(v)
0
Question
8
8.
cosec
29°
sec
61°
=
(i)
0
(ii)
tan
29°
(iii)
1
(iv)
-1
(v)
tan
61°
Question
9
9.
sin
11°
cos
17°
cos
79°
sin
73°
=
(i)
-1
(ii)
0
(iii)
1
(iv)
tan
17°
(v)
tan
11°
Question
10
10.
cos
65°
sin
55°
sin
25°
cos
35°
=
(i)
-1
(ii)
0
(iii)
tan
65°
(iv)
tan
55°
(v)
1
Question
11
11.
tan
47°
cot
2°
cot
43°
tan
88°
=
(i)
1
(ii)
0
(iii)
-1
(iv)
tan
47°
(v)
tan
2°
Question
12
12.
cot
80°
tan
79°
tan
10°
cot
11°
=
(i)
tan
79°
(ii)
-1
(iii)
tan
80°
(iv)
0
(v)
1
Question
13
13.
sec
55°
cosec
20°
cosec
35°
sec
70°
=
(i)
-1
(ii)
tan
55°
(iii)
0
(iv)
1
(v)
tan
20°
Question
14
14.
cosec
78°
sec
61°
sec
12°
cosec
29°
=
(i)
-1
(ii)
1
(iii)
tan
78°
(iv)
0
(v)
tan
61°
Question
15
15.
sin
49°
−
cos
41°
=
(i)
2
sin
41°
(ii)
-1
(iii)
1
(iv)
2
sin
49°
(v)
0
Question
16
16.
cos
51°
−
sin
39°
=
(i)
2
sin
51°
(ii)
2
sin
39°
(iii)
-1
(iv)
0
(v)
1
Question
17
17.
tan
9°
−
cot
81°
=
(i)
2
sin
81°
(ii)
2
sin
9°
(iii)
0
(iv)
-1
(v)
1
Question
18
18.
cot
12°
−
tan
78°
=
(i)
0
(ii)
-1
(iii)
2
sin
78°
(iv)
2
sin
12°
(v)
1
Question
19
19.
sec
71°
−
cosec
19°
=
(i)
2
sin
19°
(ii)
2
sin
71°
(iii)
1
(iv)
-1
(v)
0
Question
20
20.
cosec
2°
−
sec
88°
=
(i)
1
(ii)
0
(iii)
2
sin
2°
(iv)
2
sin
88°
(v)
-1
Question
21
21.
sin
42°
cos
18°
−
cos
48°
sin
72°
=
(i)
-1
(ii)
0
(iii)
2
sin
42°
(iv)
2
sin
18°
(v)
1
Question
22
22.
cos
43°
sin
36°
−
sin
47°
cos
54°
=
(i)
0
(ii)
-1
(iii)
1
(iv)
2
sin
43°
(v)
2
sin
36°
Question
23
23.
tan
15°
cot
80°
−
cot
75°
tan
10°
=
(i)
2
sin
80°
(ii)
-1
(iii)
0
(iv)
2
sin
15°
(v)
1
Question
24
24.
cot
58°
tan
51°
−
tan
32°
cot
39°
=
(i)
1
(ii)
-1
(iii)
2
sin
58°
(iv)
0
(v)
2
sin
51°
Question
25
25.
sec
65°
cosec
26°
−
cosec
25°
sec
64°
=
(i)
2
sin
65°
(ii)
0
(iii)
1
(iv)
-1
(v)
2
sin
26°
Question
26
26.
cosec
17°
sec
34°
−
sec
73°
cosec
56°
=
(i)
2
sin
34°
(ii)
2
sin
17°
(iii)
1
(iv)
-1
(v)
0
Question
27
27.
Find the value of
tan
30°
tan
55°
tan
60°
tan
35°
(i)
1
(ii)
0
(iii)
2
(iv)
undefined
(v)
-1
Question
28
28.
Find the value of
cot
50°
cot
80°
cot
40°
cot
10°
(i)
undefined
(ii)
1
(iii)
2
(iv)
-1
(v)
0
Question
29
29.
sin
77°
+
cos
57°
=
(i)
cos
13°
+
sin
33°
(ii)
cos
77°
+
sin
57°
(iii)
sin
77°
+
sin
57°
(iv)
cos
13°
+
cos
33°
Question
30
30.
cos
17°
+
sin
77°
=
(i)
sin
17°
+
cos
77°
(ii)
cos
17°
+
cos
77°
(iii)
sin
73°
+
sin
13°
(iv)
sin
73°
+
cos
13°
Question
31
31.
tan
80°
+
cot
15°
=
(i)
tan
80°
+
tan
15°
(ii)
cot
80°
+
tan
15°
(iii)
cot
10°
+
tan
75°
(iv)
cot
10°
+
cot
75°
Question
32
32.
cot
32°
+
tan
24°
=
(i)
tan
32°
+
cot
24°
(ii)
tan
58°
+
cot
66°
(iii)
tan
58°
+
tan
66°
(iv)
cot
32°
+
cot
24°
Question
33
33.
sec
14°
+
cosec
11°
=
(i)
cosec
76°
+
sec
79°
(ii)
cosec
14°
+
sec
11°
(iii)
cosec
76°
+
cosec
79°
(iv)
sec
14°
+
sec
11°
Question
34
34.
cosec
54°
+
sec
64°
=
(i)
sec
54°
+
cosec
64°
(ii)
sec
36°
+
sec
26°
(iii)
sec
36°
+
cosec
26°
(iv)
cosec
54°
+
cosec
64°
Assignment Key
1) (i)
2) (v)
3) (iii)
4) (v)
5) (iv)
6) (iii)
7) (i)
8) (iii)
9) (iii)
10) (v)
11) (i)
12) (v)
13) (iv)
14) (ii)
15) (v)
16) (iv)
17) (iii)
18) (i)
19) (v)
20) (ii)
21) (ii)
22) (i)
23) (iii)
24) (iv)
25) (ii)
26) (v)
27) (i)
28) (ii)
29) (i)
30) (iv)
31) (iii)
32) (ii)
33) (i)
34) (iii)
