Use the formula $\tan \psi = \left| \frac { m _ { 2 } - m _ { 1 } } { 1 + m _ { 1 } m _ { 2 } } \right|$ to find the acute angle $\psi$ formed by the two lines $y - x = 0$ and $2 x - 3 y = 1$ .

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The Answer of Use the formula $\tan \psi = \left| \frac { m _ { 2 } - m _ { 1 } } { 1 + m _ { 1 } m _ { 2 } } \right|$ to find the acute angle $\psi$ formed by the two lines $y - x = 0$ and $2 x - 3 y = 1$ .

Use the Formula tan⁡ψ=∣m2−m11+m1m2∣\tan \psi = \left| \frac { m _ { 2 } - m _ { 1 } } { 1 + m _ { 1 } m _ { 2 } } \right|tanψ=​1+m1​m2​m2​−m1​​​

Use the Formula $\tan \psi = \left| \frac { m _ { 2 } - m _ { 1 } } { 1 + m _ { 1 } m _ { 2 } } \right|$