3 years ago

HELP ME PLEASE ILL MSRK YOU A BRAINLIEST IF YOU GET THIS RIGHT !!!NO SPAM!!!

Mathematics

1 answer:

balu736 [363]3 years ago

5 0

Answer:

B I'm pretty sure its been a while if I wrong in sorry

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Consider the two vectors A with arrow = 3 î − ĵ and B with arrow = − î − 2 ĵ. (a) Calculate A with arrow + B with arrow 2 Correc

Verdich [7]

Answer:

Let $\vec{A}=3\hat{i}-\hat{j}$ and $\vec{B}=-\hat{i}-2\hat{j}$ .

$\vec{A}+\vec{B}=(3\hat{i}-\hat{j})+(-\hat{i}-2\hat{j})=2\hat{i}-3\hat{j}$

$\vec{A}-\vec{B}=(3\hat{i}-\hat{j})-(-\hat{i}-2\hat{j})=4\hat{i}+\hat{j}$

c) Now we calculate the direction of $\vec{A}+\vec{B}$ and $\vec{A}-\vec{B}$

We calculate the direction of $\vec{A}+\vec{B}$ like this:

$\theta=tan^{-1}(\frac{-3}{2})=-56,3^{\circ}$ . Since, $270\leq\theta\leq360$ , then the direction of $\vec{A}+\vec{B}$ is $360^{\circ}-\theta=360^{\circ}-56.3^{\circ}=303.7^{\circ}$ .

Now, for $\vec{A}-\vec{B}$

$\theta=tan^{-1}(\frac{1}{4})=14^{\circ}$ .

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3 years ago

What is the solution of sqrt 2x+4 - sqrt x =2

tekilochka [14]

The answer you are lookong for is b

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Me jay bought a television for 9560, he used it for some years and later sold it at a profit of 1439. Find his selling price

Brums [2.3K]

Answer:

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Step-by-step explanation:

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Thenks and mark me brainliest :)

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Can somebody let me know if this is right or not ??

musickatia [10]

Answer:

B is only equilateral, everything else is correct.

Step-by-step explanation:

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