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Quiz 2
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Q.1
If rsinθ = 1, rcosθ = $$\sqrt 3 {\text{,}}$$ then the value of r
2
tanθ is?
4
$$\frac{1}{{\sqrt 3 }}$$
$$\frac{4}{{\sqrt 3 }}$$
$${\text{4}}\sqrt 3 $$
Q.2
If α + β = 90°, then the value of (1 - sin
2
α)(1 - cos
2
α) × (1 + cot
2
β)(1 + tan
2
β) is?
1
-1
0
2
Q.3
$$\frac{{{\text{tan}}\theta + \cot \theta }}{{{\text{tan}}\theta - \cot \theta }} = 2,$$ $$\left( {0 \leqslant \theta \leqslant {{90}^ \circ }} \right),$$ then the value of $$\sin \theta $$ is?
$$\frac{2}{{\sqrt 3 }}$$
$$\frac{{\sqrt 3 }}{2}$$
$$\frac{1}{2}$$
1
Q.4
sin
2
θ - 3sinθ +2 = 0, will be true if ?
0 ≤ θ ≤ 90°
0 < θ < 90°
θ = 0°
θ = 90°
Q.5
If 2(cos
2
θ - sin
2
θ) = 1, (θ is positive acute angle), then cotθ is equal to?
$$ - \sqrt 3 $$
$$\frac{1}{{\sqrt 3 }}$$
1
$$\sqrt 3 $$
Q.6
If tanθ + cotθ = 2, then the value if tan
100
θ + cot
100
θ is?
2
0
1
$$\sqrt 3 $$
Q.7
The value of, $${\text{sec}}\theta \left( {\frac{{1 + \sin \theta }}{{{\text{cos}}\theta }} + \frac{{{\text{cos}}\theta }}{{1 + \sin \theta }}} \right)$$ - $$2{\text{ta}}{{\text{n}}^2}\theta $$ is?
4
1
2
0
Q.8
If $${\text{tan }}{9^ \circ } = \frac{p}{q}{\text{,}}$$ then the value of $$\frac{{{\text{se}}{{\text{c}}^2}{\text{8}}{{\text{1}}^ \circ }}}{{1 + {{\cot }^2}{{81}^ \circ }}}$$ is?
$$\frac{p}{q}$$
1
$$\frac{{{p^2}}}{{{q^2}}}$$
$$\frac{{{q^2}}}{{{p^2}}}$$
Q.9
The value of following is, cos24° + cos55° + cos125° + cos204° + cos300° ?
$$ - \frac{1}{2}$$
$$\frac{1}{2}$$
2
1
Q.10
If 7sin
2
θ + 3cos
2
θ = 4, (0° ≤ θ ≤ 90°), then the value of θ is?
$$\frac{\pi }{2}$$
$$\frac{\pi }{3}$$
$$\frac{\pi }{6}$$
$$\frac{\pi }{4}$$
Q.11
The value of the expression: sin
2
1° + sin
2
11° + sin
2
21° + sin
2
31° + sin
2
41° + sin
2
45° + sin
2
49° + sin
2
59° + sin
2
69° + sin
2
79° + sin
2
89° is?
0
$${\text{5}}\frac{1}{2}$$
$${\text{4}}\frac{1}{2}$$
5
Q.12
If cos20° = m and cos70° =n, then the value of m
2
+ n
2
is?
$$\frac{1}{2}$$
1
$$\frac{3}{2}$$
$$\frac{1}{{\sqrt 2 }}$$
Q.13
If xtan60° + cos45° = sec45°, then the value of x
2
+ 1 is?
$$\frac{6}{7}$$
$$\frac{7}{6}$$
$$\frac{5}{6}$$
$$\frac{6}{5}$$
Q.14
x, y be two acute angles, x + y < 90° and sin(2x - 20°) = cos(2y + 20°), the value of tan(x + y) is?
$$\sqrt 3 $$
$$\frac{1}{{\sqrt 3 }}$$
1
$${\text{2}} + \sqrt 2 $$
Q.15
If tan15° = 2 - $$\sqrt 3 ,$$ then the value of tan15° cot75° + tan75° cot15° is?
14
12
10
8
Q.16
If A = tan11°. tan29°, B = 2cot61°. cot79° then -
A = 2B
A = -2B
2A = B
2A = -B
Q.17
If $$\sin \alpha + \cos \beta = 2;$$ $$\left( {{0^ \circ } \leqslant \beta < \alpha \leqslant {{90}^ \circ }} \right){\text{,}}$$ then $${\text{sin}}\,{\left( {\frac{{2\alpha + \beta }}{3}} \right)^ \circ }$$ is?
$${\text{sin }}\frac{\alpha }{2}$$
$$\cos \frac{\alpha }{3}$$
$${\text{sin }}\frac{\alpha }{3}$$
$$\cos \frac{{2\alpha }}{3}$$
Q.18
If $$2\sin \left( {\frac{{\pi x}}{2}} \right) = {x^2} + \frac{1}{{{x^2}}}{\text{,}}$$ then the value of $$\left( {x - \frac{1}{x}} \right)$$ is?
-1
2
1
0
Q.19
If secA + tanA = a, then the value of cosA is?
$$\frac{{{a^2} + 1}}{{2a}}$$
$$\frac{{2a}}{{{a^2} + 1}}$$
$$\frac{{{a^2} - 1}}{{2a}}$$
$$\frac{{2a}}{{{a^2} - 1}}$$
Q.20
If sinP + cosecP = 2, then the value of sin
7
P + cosec
7
P is?
1
2
3
0
Q.21
If tan(2θ + 45°) = cot3θ, where (2θ + 45°) and 3θ are acute angles, then the value of θ is?
5°
9°
12°
15°
Q.22
If $${\text{sin}}\left( {{{90}^ \circ } - \theta } \right)$$ + $${\text{cos}}\theta $$ = $$\sqrt 2 {\text{cos}}\left( {{{90}^ \circ } - \theta } \right){\text{,}}$$ then the value of $${\text{cosec}}\theta $$ is?
$$\frac{1}{{\sqrt 3 }}$$
$$\frac{2}{3}$$
$$\sqrt {\frac{3}{2}} $$
$$\frac{1}{{\sqrt 2 }}$$
Q.23
If $${\text{sin A}} - \cos {\text{A}}$$ = $$\frac{{\sqrt 3 - 1}}{2}{\text{,}}$$ then the value of $${\text{sin A}}.{\text{cosA}}$$ is?
$$\frac{1}{{\sqrt 3 }}$$
$$\frac{{\sqrt 3 }}{2}$$
$$\frac{1}{4}$$
$$\frac{{\sqrt 3 }}{4}$$
Q.24
The value of the expression 2(sin
6
θ + cos
6
θ) - 3(sin
4
θ + cos
4
θ) + 1 is?
-1
0
1
2
Q.25
If a
2
sec
2
x - b
2
tan
2
x = c
2
, then the value of sec
2
x + tan
2
x is equal to (assume b
2
≠ a
2
)
$$\frac{{{b^2} - {a^2} + 2{c^2}}}{{{b^2} + {a^2}}}$$
$$\frac{{{b^2} + {a^2} - 2{c^2}}}{{{b^2} - {a^2}}}$$
$$\frac{{{b^2} - {a^2} - 2{c^2}}}{{{b^2} + {a^2}}}$$
$$\frac{{{b^2} - {a^2}}}{{{b^2} + {a^2} + 2{c^2}}}$$
Q.26
If tan
4
θ + tan
2
θ = 1, then the value of cos
4
θ + cos
2
θ is?
2
0
1
-1
Q.27
If $${\text{tan}}\left( {\frac{\pi }{2} - \frac{\theta }{2}} \right) = \sqrt 3 $$ the value of cosθ is?
0
$$\frac{1}{{\sqrt 2 }}$$
$$\frac{1}{2}$$
1
Q.28
$$\sqrt {\frac{{1 + {\text{sin }}\theta }}{{1 - {\text{sin }}\theta }}} $$ + $$\sqrt {\frac{{1 - {\text{sin }}\theta }}{{1 + {\text{sin }}\theta }}} $$ is equal to?
2cosθ
2sinθ
2cotθ
2secθ
Q.29
If $${\left( {r\cos \theta - \sqrt 3 } \right)^2}$$ + $${\left( {r\sin \theta - 1} \right)^2}$$ = 0, then the value of $$\frac{{r\tan \theta + \sec \theta }}{{r\sec \theta + \tan \theta }}$$ is equal to?
$$\frac{4}{5}$$
$$\frac{3}{5}$$
$$\frac{{\sqrt 3 }}{4}$$
$$\frac{{\sqrt 5 }}{4}$$
Q.30
If x = cosecθ - sinθ and y = secθ - cosθ, then the relation between x and y is?
x
2
+ y
2
+ 3 = 1
x
2
y
2
(x
2
+ y
2
+ 3) = 1
x
2
(x
2
+ y
2
- 5) = 1
y
2
(x
2
+ y
2
- 5) = 1
0 h : 0 m : 1 s
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