In any \( \triangle A B C, 2(b c \cos A+c a \cos B+a b \cos C)= \) (A) \( a b c \) (B) \( a+b+c ...

Channel:
PW Solutions
Subscribers:
445,000
Published on ● Video Link: https://www.youtube.com/watch?v=5Yu0JvbrwfQ


Duration: 4:44
0 views
0

In any \( \triangle A B C, 2(b c \cos A+c a \cos B+a b \cos C)= \)
(A) \( a b c \)
(B) \( a+b+c \)
(C) \( a^{2}+b^{2}+c^{2} \)
(D) \( \frac{1}{a^{2}}+\frac{1}{b^{2}}+\frac{1}{c^{2}} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2022-11-16A train approaches a small town with a constant velocity of \( +28.6 \mathrm{~m} / \mathrm{s} \)...
2022-11-16Figure below shows the velocity-displacement curve for an object moving along a straight line. A...
2022-11-16अभिक्रियाओं से प्राप्त उत्पादों का अनुमान लगाइए-
2022-11-16Write the causing agent and symptoms of African sleeping sickness
2022-11-16The velocity-time graph of a body is shown in figure. The displacement of the body in \( 8 \math...
2022-11-16Assertion (A): Average value of \( A C \) over a complete cycle is always zero. Reason (R): Aver...
2022-11-16The graph as shown in figure below describes the motion of a ball rebounding from a horizontal s...
2022-11-16Young's double slit experiment was done by Thomas Young to demonstrate experimentally the interf...
2022-11-16A natural number is chosen at random from amongst first 500 . What is the probability that the n...
2022-11-16Plot the acceleration-time graph of the velocity-time graph given in figure.
2022-11-16In any \( \triangle A B C, 2(b c \cos A+c a \cos B+a b \cos C)= \) (A) \( a b c \) (B) \( a+b+c ...
2022-11-16A body is thrown vertically upwards from \( A \), the top of a tower. It reaches the ground in t...
2022-11-16Assertion (A): Acidimetry and alkalimetry are the terms used in volumetric analysis Reason (R): ...
2022-11-16मुक्त मूलक क्या है ?
2022-11-16If \( f, g: R \rightarrow R \) is defined by \( f(x)=x^{2}+3 x+1 \) and \( g(x)=(2 x-3) \), find...
2022-11-16William Bateson (1861-1926) proposed the theory of mutations in 1901 to explain the mechanism of...
2022-11-16What are fatty acids?
2022-11-16Which of the following is not correct? (A) Cyanobacteria are photosynthetic autotrophs (B) Both ...
2022-11-16An object is thrown up vertically. The velocity-time graph for the motion of the particle is
2022-11-16The velocity-time graph of a body is given in figure. The maximum acceleration in \( \mathrm{m} ...
2022-11-16A narrow molecular beam makes its way into a vessel filled with gas under low pressure. Find the...