Find the Cosine of the Angle Between the Two Planes $\sqrt { 35 }$

question 72

Multiple Choice

Find the cosine of the angle between the two planes x + y + z = 0 and x + 2y + 3z = 1.

• A)4/ \(\sqrt { 35 }\)
• B)6/ \(\sqrt { 35 }\)
• C)7/ \(\sqrt { 35 }\)
• D)8/ \(\sqrt { 35 }\)
• E)5/ \(\sqrt { 42 }\)
• F)6/ \(\sqrt { 42 }\)
• G)7/ \(\sqrt { 42 }\)
• H)8/ \(\sqrt { 42 }\)

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