Show that the following planes are at right angles.r⋅(2i^+6j^+6k^)=13 and r⋅(3i^+4j^−5k^)+7=0.

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Show that the following planes are at right angles. {r} (2{i}+

Question

Show that the following planes are at right angles.
$r \cdot (2 \hat{i} + 6 \hat{j} + 6 \hat{k}) = 13$ and $r \cdot (3 \hat{i} + 4 \hat{j} - 5 \hat{k}) + 7 = 0$ .

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Oliver Discussed

Show that the following planes are at right angles.

r \cdot (2 \hat{i} + 6 \hat{j} + 6 \hat{k}) = 13

and

r \cdot (3 \hat{i} + 4 \hat{j} - 5 \hat{k}) + 7 = 0

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Question Text

Show that the following planes are at right angles.

r \cdot (2 \hat{i} + 6 \hat{j} + 6 \hat{k}) = 13

and

r \cdot (3 \hat{i} + 4 \hat{j} - 5 \hat{k}) + 7 = 0