HelpMaths
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Questions
The following questions were asked by visitors named HelpMaths.
Let 𝑎⃗ and 𝑏 be two vectors in the xy plane making angles 𝜃 and ∅ with the x axis, respectively. Use vector algebra to show that: cos(𝜃 − ∅) = cos 𝜃 cos ∅ + sin 𝜃 sin ∅
11 years ago
Let P=(1,2,-1),Q=(3,-1,4),and R=(2,6,2) be three vertices of a parallelogram PQRS. (a) Find the coordinates of S. (b) Find the area of PQRS.
11 years ago
Answers
The following answers were posted by visitors named HelpMaths.