Find the Angle Between the Two Planes $\begin{array} { l } x + y - z = 3 \\4 x - 5 y - 4 z = 5\end{array}$

question 106

Multiple Choice

Find the angle between the two planes. $\begin{array} { l } x + y - z = 3 \\4 x - 5 y - 4 z = 5\end{array}$

• A)77.7°
• B)76.7°
• C)79.7°
• D)78.7°
• E)75.7°

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