EduSahara™ Assignment
Name : Trigonometric Expression Evaluation
Chapter : Trigonometrical Ratios
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
cos
0°
cosec
30°
+
cos
30°
tan
30°
=
(i)
5
(ii)
5
4
(iii)
3
2
(iv)
7
2
(v)
5
2
Question
2
2.
tan
60°
cot
90°
sec
30°
−
sec
0°
cos
90°
tan
0°
cos
30°
sec
30°
cos
0°
−
cosec
90°
tan
30°
cot
45°
=
(i)
(
−
3
)
(ii)
1
(iii)
3
(iv)
(
−
1
)
(v)
0
Question
3
3.
sin
31°
cos
59°
=
(i)
0
(ii)
1
(iii)
tan
31°
(iv)
tan
59°
(v)
-1
Question
4
4.
cos
53°
sin
37°
=
(i)
1
(ii)
-1
(iii)
tan
53°
(iv)
tan
37°
(v)
0
Question
5
5.
tan
57°
cot
33°
=
(i)
tan
33°
(ii)
0
(iii)
-1
(iv)
tan
57°
(v)
1
Question
6
6.
cot
36°
tan
54°
=
(i)
tan
54°
(ii)
0
(iii)
1
(iv)
tan
36°
(v)
-1
Question
7
7.
sec
84°
cosec
6°
=
(i)
0
(ii)
-1
(iii)
tan
84°
(iv)
1
(v)
tan
6°
Question
8
8.
cosec
26°
sec
64°
=
(i)
1
(ii)
0
(iii)
-1
(iv)
tan
26°
(v)
tan
64°
Question
9
9.
sin
24°
cos
11°
cos
66°
sin
79°
=
(i)
1
(ii)
0
(iii)
tan
24°
(iv)
tan
11°
(v)
-1
Question
10
10.
cos
73°
sin
60°
sin
17°
cos
30°
=
(i)
1
(ii)
tan
73°
(iii)
tan
60°
(iv)
-1
(v)
0
Question
11
11.
tan
47°
cot
55°
cot
43°
tan
35°
=
(i)
tan
55°
(ii)
tan
47°
(iii)
1
(iv)
0
(v)
-1
Question
12
12.
cot
10°
tan
33°
tan
80°
cot
57°
=
(i)
-1
(ii)
tan
33°
(iii)
tan
10°
(iv)
1
(v)
0
Question
13
13.
sec
27°
cosec
56°
cosec
63°
sec
34°
=
(i)
tan
56°
(ii)
-1
(iii)
1
(iv)
tan
27°
(v)
0
Question
14
14.
cosec
32°
sec
68°
sec
58°
cosec
22°
=
(i)
-1
(ii)
1
(iii)
0
(iv)
tan
32°
(v)
tan
68°
Question
15
15.
sin
66°
−
cos
24°
=
(i)
1
(ii)
-1
(iii)
2
sin
24°
(iv)
2
sin
66°
(v)
0
Question
16
16.
cos
35°
−
sin
55°
=
(i)
-1
(ii)
0
(iii)
1
(iv)
2
sin
55°
(v)
2
sin
35°
Question
17
17.
tan
3°
−
cot
87°
=
(i)
2
sin
87°
(ii)
1
(iii)
2
sin
3°
(iv)
-1
(v)
0
Question
18
18.
cot
49°
−
tan
41°
=
(i)
1
(ii)
-1
(iii)
0
(iv)
2
sin
49°
(v)
2
sin
41°
Question
19
19.
sec
88°
−
cosec
2°
=
(i)
0
(ii)
2
sin
88°
(iii)
1
(iv)
-1
(v)
2
sin
2°
Question
20
20.
cosec
73°
−
sec
17°
=
(i)
2
sin
17°
(ii)
-1
(iii)
0
(iv)
2
sin
73°
(v)
1
Question
21
21.
sin
10°
cos
56°
−
cos
80°
sin
34°
=
(i)
2
sin
56°
(ii)
1
(iii)
2
sin
10°
(iv)
-1
(v)
0
Question
22
22.
cos
10°
sin
37°
−
sin
80°
cos
53°
=
(i)
2
sin
10°
(ii)
1
(iii)
-1
(iv)
0
(v)
2
sin
37°
Question
23
23.
tan
88°
cot
48°
−
cot
2°
tan
42°
=
(i)
2
sin
48°
(ii)
2
sin
88°
(iii)
-1
(iv)
0
(v)
1
Question
24
24.
cot
56°
tan
17°
−
tan
34°
cot
73°
=
(i)
-1
(ii)
2
sin
17°
(iii)
2
sin
56°
(iv)
0
(v)
1
Question
25
25.
sec
10°
cosec
42°
−
cosec
80°
sec
48°
=
(i)
0
(ii)
2
sin
10°
(iii)
2
sin
42°
(iv)
1
(v)
-1
Question
26
26.
cosec
36°
sec
56°
−
sec
54°
cosec
34°
=
(i)
0
(ii)
2
sin
36°
(iii)
1
(iv)
-1
(v)
2
sin
56°
Question
27
27.
Find the value of
tan
15°
tan
65°
tan
75°
tan
25°
(i)
0
(ii)
undefined
(iii)
-1
(iv)
1
(v)
2
Question
28
28.
Find the value of
cot
5°
cot
70°
cot
85°
cot
20°
(i)
1
(ii)
2
(iii)
undefined
(iv)
-1
(v)
0
Question
29
29.
sin
52°
+
cos
39°
=
(i)
cos
38°
+
cos
51°
(ii)
cos
38°
+
sin
51°
(iii)
cos
52°
+
sin
39°
(iv)
sin
52°
+
sin
39°
Question
30
30.
cos
60°
+
sin
73°
=
(i)
sin
60°
+
cos
73°
(ii)
sin
30°
+
sin
17°
(iii)
sin
30°
+
cos
17°
(iv)
cos
60°
+
cos
73°
Question
31
31.
tan
71°
+
cot
15°
=
(i)
cot
19°
+
tan
75°
(ii)
cot
71°
+
tan
15°
(iii)
cot
19°
+
cot
75°
(iv)
tan
71°
+
tan
15°
Question
32
32.
cot
78°
+
tan
71°
=
(i)
cot
78°
+
cot
71°
(ii)
tan
12°
+
cot
19°
(iii)
tan
12°
+
tan
19°
(iv)
tan
78°
+
cot
71°
Question
33
33.
sec
32°
+
cosec
80°
=
(i)
sec
32°
+
sec
80°
(ii)
cosec
32°
+
sec
80°
(iii)
cosec
58°
+
cosec
10°
(iv)
cosec
58°
+
sec
10°
Question
34
34.
cosec
26°
+
sec
15°
=
(i)
cosec
26°
+
cosec
15°
(ii)
sec
64°
+
cosec
75°
(iii)
sec
26°
+
cosec
15°
(iv)
sec
64°
+
sec
75°
Assignment Key
1) (v)
2) (v)
3) (ii)
4) (i)
5) (v)
6) (iii)
7) (iv)
8) (i)
9) (i)
10) (i)
11) (iii)
12) (iv)
13) (iii)
14) (ii)
15) (v)
16) (ii)
17) (v)
18) (iii)
19) (i)
20) (iii)
21) (v)
22) (iv)
23) (iv)
24) (iv)
25) (i)
26) (i)
27) (iv)
28) (i)
29) (ii)
30) (iii)
31) (i)
32) (ii)
33) (iv)
34) (ii)
