In a \( \triangle A B C, 2 a c \sin \left[\frac{1}{2}(A-B+C)\right]...
In a \( \triangle A B C, 2 a c \sin \left[\frac{1}{2}(A-B+C)\right] \) is equal to
(a) \( a^{2}+b^{2}-c^{2} \)
(b) \( c^{2}+a^{2}-b^{2} \)
(2000, 2M)
\( \mathrm{P} \)
(c) \( b^{2}-c^{2}-a^{2} \)
(d) \( c^{2}-a^{2}-b^{2} \)
WV
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live
Other Videos By PW Solutions
| 2023-02-13 | Phenetic classification is based on -
(1) ancestral lineage of exis... |
| 2023-02-13 | The results of numerical taxonomy are summarised in the form of tre... |
| 2023-02-13 | In a \( \triangle A B C \) with fixed base \( B C \), the vertex \(... |
| 2023-02-13 | Select the correct statement(s)
(A) \( \mathrm{Co} \) (III) is stabilised in presence of weak fi... |
| 2023-02-13 | In a \( \triangle P Q R, P \) is the largest angle and \( \cos P=\f... |
| 2023-02-13 | Select incorrect statement(s) for \( \left[\mathrm{Cu}(\mathrm{CN})_{4}\right]^{3-} \), \( \left... |
| 2023-02-13 | In a \( \triangle A B C \), among the following which one is true?
... |
| 2023-02-13 | The following are two steps involved in finding the values of \( p \) and \( q \) from \( 3^{p}+... |
| 2023-02-13 | In a \( \triangle A B C, \angle B=\frac{\pi}{3} \) and \( \angle C=... |
| 2023-02-13 | In a \( \triangle P Q R, \angle R=\frac{\pi}{2} \), if \( \tan \lef... |
| 2023-02-13 | In a \( \triangle A B C, 2 a c \sin \left[\frac{1}{2}(A-B+C)\right]... |
| 2023-02-13 | If the angles of a triangle are in the ratio \( 4: 1: 1 \), then th... |
| 2023-02-13 | Given, \( \frac{b+c}{11}=\frac{c+a}{12}=\frac{a+b}{13} \) for a \( ... |
| 2023-02-13 | \( A B C D \) is a trapezium such that \( A B \) and \( C D \) are ... |
| 2023-02-13 | If the angles \( A, B \) and \( C \) of a triangle are in an arithm... |
| 2023-02-13 | In a triangle, the sum of lengths of two sides is \( x \) and the p... |
| 2023-02-13 | The period of oscillation of a freely suspended bar magnet is 4 second. If it is cut into two eq... |
| 2023-02-13 | The angles \( A, B \) and \( C \) of a \( \triangle A B C \) are in... |
| 2023-02-13 | If \( a, b, c \) are positive real numbers
\[
\begin{array}{l}
\th... |
| 2023-02-13 | Solve the following equation for \( x \).
\[
\tan ^{-1} 2 x+\tan ^{... |
| 2023-02-13 | The numerical value of \( \tan \left[2 \tan ^{-1}\left(\frac{1}{5}\... |
0