If \( x+y+z=\pi \) and \[ \Delta=\left|\begin{array}{ccc} \sin 3 x & \sin 3 y & \sin 3 z \\ \sin...

Channel:
Subscribers:
443,000
Published on ● Video Link: https://www.youtube.com/watch?v=-Dpeov_N4us



Duration: 4:49
0 views
0


If \( x+y+z=\pi \) and
\[
\Delta=\left|\begin{array}{ccc}
\sin 3 x & \sin 3 y & \sin 3 z \\
\sin x & \sin y & \sin z \\
\cos x & \cos y & \cos z
\end{array}\right|
\]
then \( \Delta \) equals
(a) 3
(b) \( -1 \)
(c) 0
šŸ“²PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live




Other Videos By PW Solutions


2022-11-19A child arranges 3 distinct black balls, four green balls, and five red balls in a row randomly....
2022-11-19Two numbers \( x \) and \( y \) are chosen at random from the numbers from the set \( \{1,2,3, \...
2022-11-19A bag contains \( n+1 \) coins. It is known that one of these coins shows heads on both sides, w...
2022-11-19Suppose \( X \sim B(n, p) \) and \( P(X=3)=P(X=5) \). If \( p \) \( 1 / 2 \), then (a) \( n \leq...
2022-11-19The probability that an electric bulb will last 150 days or more is \( 0.7 \) and that it will l...
2022-11-19Let \( a_{1} \neq 0 \) and \( A_{1}, B_{1}, C_{1} \ldots \) be respectively the cofactors of the...
2022-11-19A bag contains 4 brown and 5 white socks. A man pulls two socks at random without replacement. T...
2022-11-19The probability that an event \( A \) occurrs in a single trial of an experiment is \( 0.6 \). T...
2022-11-19Given that \[ \begin{aligned} f(\alpha) &=\left|\begin{array}{ccc} \cos (x+\alpha) & -\sin (x+\a...
2022-11-19If \( \triangle A B C \) is not a right triangle, then value of \[ \Delta=\left|\begin{array}{cc...
2022-11-19If \( x+y+z=\pi \) and \[ \Delta=\left|\begin{array}{ccc} \sin 3 x & \sin 3 y & \sin 3 z \\ \sin...
2022-11-19If \( n \) is an odd natural number, then number of zeros at the end of \( 99^{n}+1 \) is (a) 2 ...
2022-11-19Value of \( S=\sum_{k=1}^{\infty} \sum_{r=0}^{k} \frac{1}{3^{k}}\left({ }^{k} C_{r}\right) \) is...
2022-11-19If the term independent of \( x \) in the expansion of \( \left(\sqrt{x}-\frac{k}{x^{2}}\right)^...
2022-11-19If \( m= \) the number of three digit numbers of the form \( x y z \) with \( x, zy, x \neq 0 \)...
2022-11-19If \( m= \) the number of natural numbers lying between 100 and 1000 that can be formed by using...
2022-11-19If \( x^{2 r} \) occurs in \( \left(x+\frac{2}{x^{2}}\right)^{n} \), then \( n-2 r \) must be of...
2022-11-19Let \( S_{n}=\sum_{r=1}^{n} t_{r}=\frac{1}{6} n\left(2 n^{2}+9 n+13\right) \), then \( \sum_{r=1...
2022-11-19Let \( m= \) the number of ways in which 15 identical objects can be distributed among 6 people,...
2022-11-19In a sequence of 21 terms the first 11 terms are in A.P. with common difference 2 and the last 1...
2022-11-19Suppose \( a, b, c \) are in A.P. Let \( A, G \) be the arithmetic mean and geometric mean betwe...



Tags:
pw