If \( x=r \sin \theta \cos \phi, y=r \sin \theta \sin \phi \) and \( z=r \cos \theta \), then
(W...
If \( x=r \sin \theta \cos \phi, y=r \sin \theta \sin \phi \) and \( z=r \cos \theta \), then
(W)
(a) \( x^{2}+y^{2}+z^{2}=r^{2} \)
(b) \( x^{2}+y^{2}-z^{2}=r^{2} \)
(c) \( x^{2}-y^{2}+z^{2}=r^{2} \)
(d) \( z^{2}+y^{2}-x^{2}=r^{2} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live
Other Videos By PW Solutions
| 2023-02-20 | If \( \triangle A B C \) is right angled at \( C \), then the value of \( \cos (A+B) \) is
(a) 0... |
| 2023-02-20 | The value of \( \sin \left(45^{\circ}+\theta\right)-\cos \left(45^{\circ}-\theta\right) \) is eq... |
| 2023-02-20 | If \( \sin \theta-\cos \theta=0 \), then the value of \( \sin ^{4} \theta+\cos ^{4} \theta \) is... |
| 2023-02-20 | \[
(1+\tan \theta+\sec \theta)(1+\cot \theta-\operatorname{cosec} \theta)=
\]
(a) 0
(b) 1
(c) 2
... |
| 2023-02-20 | उस फुपफुसी रोग का नाम बताइए जिसमें कूपिकीय भित्तियों के क्षय हो जाने के कारण गैस-विनिमय में शामि... |
| 2023-02-20 | If \( a \cos \theta-b \sin \theta=c \), then \( a \sin \theta+b \cos \theta= \)
P
(a) \( \pm \sq... |
| 2023-02-20 | If \( x=a \sec \theta \cos \phi, y=b \sec \theta \sin \phi \) and \( z=c \tan \theta \), then \(... |
| 2023-02-20 | If \( \cos A+\cos ^{2} A=1 \), then \( \sin ^{2} A+\sin ^{4} A= \)
(a) \( -1 \)
(b) 0
(c) 1
(d) ... |
| 2023-02-20 | Which of the following is not chelating agent?
(1) Hydrazine
(2) oxalato
(3) glycinato
(4) ethyl... |
| 2023-02-20 | If \( \sin \theta+\sin ^{2} \theta=1 \), then \( \cos ^{2} \theta+\cos ^{4} \theta= \)
(a) \( -1... |
| 2023-02-20 | If \( x=r \sin \theta \cos \phi, y=r \sin \theta \sin \phi \) and \( z=r \cos \theta \), then
(W... |
| 2023-02-20 | The value of \( \sin ^{2} 29^{\circ}+\sin ^{2} 61^{\circ} \) is
(a) 1
(b) 0
(c) \( 2 \sin ^{2} 2... |
| 2023-02-20 | If \( a \cot \theta+b \operatorname{cosec} \theta=p \) and \( b \cot \theta+a \operatorname{cose... |
| 2023-02-20 | If \( a \cos \theta+b \sin \theta=4 \) and \( a \sin \theta-b \cos \theta=3 \), then \( a^{2}+b^... |
| 2023-02-20 | \( 2\left(\sin ^{6} \theta+\cos ^{6} \theta\right)-3\left(\sin ^{4} \theta+\cos ^{4} \theta\righ... |
| 2023-02-20 | \( \frac{\cot \theta}{\cot \theta-\cot 3 \theta}+\frac{\tan \theta}{\tan \theta-\tan 3 \theta} \... |
| 2023-02-20 | If \( x=a \cos \theta \) and \( y=b \sin \theta \), then \( b^{2} x^{2}+a^{2} y^{2}= \)
Q
(a) \(... |
| 2023-02-20 | If \( x=a \sec \theta \) and \( y=b \tan \theta \), then \( b^{2} x^{2}-a^{2} y^{2}= \)
(a) \( a... |
| 2023-02-20 | \( (\operatorname{cosec} \theta-\sin \theta)(\sec \theta-\cos \theta)(\tan \theta+\cot \theta) \... |
| 2023-02-20 | \( \frac{\tan \theta}{\sec \theta-1}+\frac{\tan \theta}{\sec \theta+1} \) is equal to
Qu)
(a) \(... |
| 2023-02-20 | \( \frac{\sin \theta}{1-\cot \theta}+\frac{\cos \theta}{1-\tan \theta} \) is equal to
Qu
(a) 0
(... |
0