If a line makes angles of $90^\circ$, $135^\circ$ and $45^\circ$ with the x, y and z axes respectively, then its direction cosines are ______.

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If a line makes angles of $90^\circ$, $135^\circ$ and $45^\circ$ with the x, y and z axes respectively, then its direction cosines are `underlinebb(0, -1/sqrt(2), 1/sqrt(2))`. Explanation: l = cos $\alpha$, m = cos $\beta$, n = cos γ l = cos $90^\circ$, m = cos $135^\circ$, n = cos $45^\circ$ l = 0, m = (-1)/sqrt(2), n = 1/sqrt(2)

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