If the angle between the planes given by $6x^2+4y^2-10z^2+3yz+4zx-11xy=0$ is $\cos^{-1}(k)$, then the value of $k$ is equal to?
Which concept am I supposed to use here? How can I separate the planes?
2026-04-01 07:57:23.1775030243
Angle between given planes
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HINT: Wolfram Alpha factored the left hand side as $$(2 x - y - 2 z) (3 x - 4 y + 5 z).$$
Can you take it from here?