In a \( \triangle A B C \), if \( a, b \) and \( c \) are in A.P., prove that \( \cos A \cdot \c...

Channel:
PW Solutions
Subscribers:
443,000
Published on ● Video Link: https://www.youtube.com/watch?v=PuoVb52tEqs


Duration: 13:36
1 views
0

In a \( \triangle A B C \), if \( a, b \) and \( c \) are in A.P., prove that \( \cos A \cdot \cot \frac{A}{2}, \cos B . \cot \frac{B}{2} \), and \( \cos C . \cot \frac{C}{2} \) are in A.P.
\( \mathrm{P} \)
W
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2023-02-14In any \( \triangle \mathrm{ABC} \), prove that \( \mathrm{P} \) \[ r^{2}+r_{1}^{2}+r_{2}^{2}+r_...
2023-02-14If in a triangle \( A B C, \frac{\cos A+2 \cos C}{\cos A+2 \cos B}=\frac{\sin B}{\sin C} \) prov...
2023-02-14In each of the following questions read the two statements and choo...
2023-02-14\[ \int \sin ^{3}(2 x+1) d x=? \] (a) \( \frac{1}{8} \sin ^{4}(2 x+...
2023-02-14\[ \int \frac{d x}{\sqrt{\sin ^{3} x \cos x}}=? \] (a) \( 2 \sqrt{\...
2023-02-14\[ \int \sqrt{1-4 x-x^{2}} d x \] P W)
2023-02-14A disc of radius \( R \) rolls on a horizontal ground with linear acceleration \( a \) and angul...
2023-02-14Which of following pairs of functions are identical. (a) \( f(x)=e^{\left(n \sec ^{-1} x\right.}...
2023-02-14In each of the following questions read the two statements and choo...
2023-02-14\( \sqrt{x^{2}+6 x-4} d x \) \( \mathrm{P} \) W
2023-02-14In a \( \triangle A B C \), if \( a, b \) and \( c \) are in A.P., prove that \( \cos A \cdot \c...
2023-02-14\( \tan ^{-1}(\tan \theta)=\left\{\begin{array}{cc}\pi+\theta, & -\frac{3 \pi}{2}\theta-\frac{\p...
2023-02-14Hole is P (a) an anti-particle of electron. W (b) a vacancy created...
2023-02-14\[ \int \sqrt{2 x-x^{2}} d x \] P W
2023-02-14In each of the following questions read the two statements and choo...
2023-02-14Two identical masses are connected to a horizontal thin massless rod as shown in the figure. Whe...
2023-02-14An impulse \( J=m v \) at one end of a stationary uniform frictionless rod of mass \( m \) and l...
2023-02-14\( \lim _{x \rightarrow \pi / 4} \frac{\sqrt{2} \cos x-1}{\cot x-1}= \) \( \mathrm{P} \) (1) \( ...
2023-02-14The area bounded by the curves \( \mathrm{y}^{2}=8 \mathrm{x} \) an...
2023-02-14In ] \( \quad V_{o} \) is the potential barrier across a p-n juncti...
2023-02-14The area of the region bounded by the curves \( y=x^{2} \) and \( \...