Question Answer : Trigonometry-ENGLISH

Q.1	$s i n^{2} 38 ° + c o s^{2} 38 ° = ?$ A. $\frac{1}{2}$ B. $\sqrt{3}$ C. 1 D. $\frac{1}{3}$ Answer : Option C Discussion Answer : Option C Error Report!! View Answer Discuss on Question Error In Question
Q.2	In a triangle, sides are in A.P. and biggest angle is twice of smallest, then the ratio of sides are A. 3 : 4 : 5 B. 4 : 5 : 6 C. 2 : 4 : 5 D. 7 : 8 : 9 Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.3	The value of $\cos 52 ° + \cos 68 ° + \cos 172 °$ is A. 0 B. 1 C. -1 D. $- \frac{1}{2}$ Answer : Option A Discussion Answer : Option A Error Report!! View Answer Discuss on Question Error In Question
Q.4	$\tan 70 °$ is equals to A. $\tan 50 ° + \tan 20 °$ B. $2 \tan 50 ° + \tan 20 °$ C. $\tan 50 ° + 2 \tan 20 °$ D. $2 \tan 50 ° + 2 \tan 20 °$ Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.5	The angle of elevation of top of a tower from a point P on a plane field is $30 °$ . If the height of the tower is 100m, then the distance of point P from the bottom of the tower wil be A. 200m B. 173m C. 156m D. 149m Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.6	Angle of elevtion of top of a tower from a point on earth is $30 °$ . After walking 30m towards the building, the angle of elevation of top of the building becomes $60 °$ . What is the height of the building? A. $10 \sqrt{3} m$ B. $15 \sqrt{3} m$ C. 10m D. 15 m Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.7	$\sqrt{\frac{1 - \sin A}{1 + \sin A}} = ?$ A. $\frac{1}{\cos A} - \tan A$ B. $\cos A - \frac{1}{\tan A}$ C. $\frac{1}{\cos A} - \frac{1}{\tan A}$ D. cosA-tanA Answer : Option A Discussion Answer : Option A Error Report!! View Answer Discuss on Question Error In Question
Q.8	The value of $\sin 30 ° + \tan 45 ° - \cos 60 °$ is A. 0.5 B. 2 C. 1 D. -0.5 Answer : Option C Discussion Answer : Option C Error Report!! View Answer Discuss on Question Error In Question
Q.9	If tan $\tan θ = \frac{1}{2}$ and $\tan φ = \frac{1}{3}$ then the value of $θ + φ$ will be A. $\frac{π}{6}$ B. 0 C. $\frac{π}{4}$ D. $\sqrt{1^{2} + 1^{2}} = \sqrt{1 + 1} = \sqrt{2}$ Answer : Option C Discussion Answer : Option C Error Report!! View Answer Discuss on Question Error In Question
Q.10	$\tan 1 ° . \tan 2 ° . \tan 3 ° . \tan 4 ° ........ \tan 80 °$ is equals to A. $\infty$ B. 0 C. 1 D. $\frac{1}{2}$ Answer : Option C Discussion Answer : Option C Error Report!! View Answer Discuss on Question Error In Question
Q.11	The value of $\cos 20 ° . \cos 40 ° . \cos 60 ° . \cos 80 °$ is A. $\frac{1}{16}$ B. 16 C. 8 D. $\frac{1}{2}$ Answer : Option A Discussion Answer : Option A Error Report!! View Answer Discuss on Question Error In Question
Q.12	The value of $\sin 10 ° . \sin 30 ° . \sin 50 ° . \sin 70 °$ is A. 8 B. $\frac{1}{16}$ C. 16 D. $\frac{1}{2}$ Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.13	The value of $\tan 20 ° . \tan 40 ° . \tan 60 ° . \tan 80 °$ is A. 2 B. 3 C. 1 D. $\frac{1}{2}$ Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.14	Maximum and minimum value of $7 \cos θ + 24 \sin θ$ is A. 7 and -7 B. 25 and -25 C. 24 and -24 D. 5 and -5 Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.15	The value of (tanA+secA-1) cos A is A. 1+sinA B. (1+sinA) (tanA-secA+1) C. 1-sinA D. None of these Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.16	The value of $\frac{\sec x - 1 + \tan x}{\tan x - \sec x + 1}$ will be A. $\frac{1 + \cos x}{\sin x}$ B. $\frac{1 + \sin x}{\cos x}$ C. $\frac{1 - \sin x}{\cos x}$ D. $\frac{1 - \cos x}{\sin x}$ Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.17	In a triangle ABC if a = 4, b = 3 and $\sin A = \frac{4}{3}$ then the value of $∠ B$ is A. $60 °$ B. $90 °$ C. $30 °$ D. $45 °$ Answer : Option B Discussion Answer : Option B Error Report!! View Answer Discuss on Question Error In Question
Q.18	$\frac{\sqrt{1 + \sin x} + \sqrt{1 - \sin x}}{\sqrt{1 + \sin x} - \sqrt{1 - \sin x}}$ is equal to A. $\cos e c x + \cot x$ B. $\cos e x + \tan x$ C. $\sec x + \tan x$ D. $\sec x + \cot x$ Answer : Option A Discussion Answer : Option A Error Report!! View Answer Discuss on Question Error In Question
Q.19	The value of $\cot 41 ° . \cot 42 ° . \cot 43 ° . \cot 44 ° . \cot 45 ° . \cot 46 ° . \cot 47 ° . \cot 48 ° . \cot 49 °$ is equals to A. $\frac{\sqrt{3}}{2}$ B. $\sqrt{3}$ C. $\frac{1}{2}$ D. 1 Answer : Option D Discussion Answer : Option D Error Report!! View Answer Discuss on Question Error In Question
Q.20	If $\tan^{2} B = \frac{1 - \sin A}{1 + \sin A}$ ,the what will be the value A + 2B A. $\frac{π}{2}$ B. $\frac{π}{3}$ C. $\frac{π}{5}$ D. $\frac{π}{6}$ Answer : Option A Discussion Answer : Option A Error Report!! View Answer Discuss on Question Error In Question

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