a) In any triangle PQR, if \( p \sin^2 \frac{R}{2} + r \sin^2 \frac{P}{2} = \frac{q}{2} \) , prove that the sides are in A.P. b) If \( \vec{a} =…
Class 12 Mathematics · 2082 · Solved Question with Answer
a) In any triangle PQR, if \( p \sin^2 \frac{R}{2} + r \sin^2 \frac{P}{2} = \frac{q}{2} \), prove that the sides are in A.P.
b) If\( \vec{a} = 4\vec{i} - 3\vec{j} + 2\vec{k} \) and \( \vec{b} = 3\vec{i} - 2\vec{j} + 4\vec{k} \) are two vectors, find the projection of \( \vec{b} \) on \( \vec{a} \)