Class  12

Class 12

12th Grade

10 Qs

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Class  12

Class 12

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Hard

Created by

D C Uma

Used 169+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If

 α=tan1(tan 5π4), β=tan1(tan 2π3), then\alpha=\tan^{-1}\left(\tan\ \frac{5\pi}{\frac{4}{ }}\right),\ \beta=\tan^{-1}\left(-\tan\ \frac{2\pi}{3}\right),\ then  

 4α=3β4\alpha=3\beta  

 3α=4β3\alpha=4\beta  

 αβ=7π3\alpha-\beta=\frac{7\pi}{3}  

none of these

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 tan1 111  +tan1  211 is equal to\tan^{-1}\ \frac{1}{11}\ \ +\tan^{-1\ }\ \frac{2}{11}\ is\ equal\ to  

 00  

 12\frac{1}{2}  

 1-1  

none of these

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 sin1x cos1x = π6,  then x is equal to\sin^{-1}x\ -\cos^{-1}x\ =\ \frac{\pi}{6},\ \ then\ x\ is\ equal\ to  

 12\frac{1}{2}   

 32\frac{\sqrt{3}}{2}  

 12-\frac{1}{2}  

 32-\frac{\sqrt{3}}{2}  

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 The value of cos1(cos 2π3) + sin1(sin 2π3) isThe\ value\ of\ \cos^{-1}\left(\cos\ \frac{2\pi}{3}\right)\ +\ \sin^{-1}\left(\sin\ \frac{2\pi}{3}\right)\ is  

 4π3\frac{4\pi}{3}  

 π2\frac{\pi}{2}  

 3π4\frac{3\pi}{4}  

 π\pi  

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 If sin1x sin1y =π2, cos1x +cos1y=π2, then (x,y)is If\ \sin^{-1}x\ -\sin^{-1}y\ =\frac{\pi}{2},\ \cos^{-1}x\ +\cos^{-1}y=\frac{\pi}{2},\ then\ \left(x,y\right)is\   

 (1,1)\left(1,1\right)  

 (0,1)\left(0,1\right)  

 (1,0)\left(1,0\right)  

 (1,1)\left(1,-1\right)  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 One branch of cos1x other than principal value branch corresponds toOne\ branch\ of\ \cos^{-1}x\ other\ than\ principal\ value\ branch\ corresponds\ to  

 [π2,3π2]\left[\frac{\pi}{2},\frac{3\pi}{2}\right]  

 [π, 2π]{3π2}\left[\pi,\ 2\pi\right]-\left\{\frac{3\pi}{2}\right\}  

 (π, 0)\left(-\pi,\ 0\right)  

 [2π, 3π]\left[2\pi,\ 3\pi\right]  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 If x<0, y<0 such that  xy=1, then tan1x +tan1y isIf\ x<0,\ y<0\ such\ that\ \ xy=1,\ then\ \tan^{-1}x\ +\tan^{-1}y\ is  

 π2\frac{\pi}{2}  

 π2-\frac{\pi}{2}  

 π-\pi  

 none of thesenone\ of\ these  

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