Lf P - Q - R and P - Q - S- then R2-S2 is equal to-

The correct option is D 2(P^2+Q^2) R^2 = P^2 + Q^2 +2PQ cosA S^2 #160;= P^2 + Q^2 2PQ #160;cosA where A is the angle between P⃗ an ...

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Theorems on Integration

lf P + Q = ...

Question

lf $\to P + \to Q = \to R$ and $\to P - \to Q = \to S$ , then $R^{2} + S^{2}$ is equal to:

P^{2} + Q^{2}

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2 (P^{2} - Q^{2})

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2 (P^{2} + Q^{2})

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4 P Q

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