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3 years ago

.. / .... .- - . / -.-- --- ..- / -.- -.-- ... :)))<3 discord is kayleelol#6666

Mathematics

2 answers:

Mademuasel [1]3 years ago

4 0

Answer:

cool thx for the points

Step-by-step explanation:

NeTakaya3 years ago

3 0

Answer:

OK. Thanks for the points.

Step-by-step explanation:

(since when did I need to put anything here?)

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The three trigonometric functions can be used to calculate unknown side lengths and angles in which type of triangle(s)?

malfutka [58]

Using the three trigonometric functions can be used to calculate unknown side lengths and angle in a right-angle triangle only.

But, if ever you we're given to find a non right-angle triangle, you will have to use sine rule or cosine rule.

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3 years ago

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Feliz [49]

Answer:

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3 years ago

If a=i+7j+k and b=i+11j+k, find a unit vector with positive first coordinate orthogonal to both a and

Scilla [17]

Take the cross product, then normalize the result.

$\mathbf a\times\mathbf b=\begin{vmatrix}\mathbf i&\mathbf j&\mathbf k\\1&7&1\\1&11&1\end{vmatrix}=-4\,\mathbf i+4\,\mathbf k$

This has norm

$\|\mathbf a\times\mathbf b\|=\sqrt{(-4)^2+4^2}=4\sqrt2$

and so a unit vector orthogonal to both given vectors is

$\dfrac{\mathbf a\times\mathbf b}{\|\mathbf a\times\mathbf b\|}=-\dfrac1{\sqrt2}\,\mathbf i+\dfrac1{\sqrt2}\,\mathbf k$

An equally correct answer would be the negative of this vector, since $\mathbf b\times\mathbf a=-\mathbf a\times\mathbf b$ .

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3 years ago

A textbook store sold a combined total of 368 psychology and sociology textbooks in a week. The number of psychology textbooks s

OLga [1]

Step-by-step explanation:

Total books = 368.

Sociology books = 92.

Psychology books = 3 times sociology books

= 3 x 92 = 276

Total = 276 + 92 = 368

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3 years ago

Find the area of the composite figure. <br><br> Please help me!!

elena55 [62]

Answer:

1,824 sq inches

Step-by-step explanation:

area of rectangle: 48 x 32 = 1536

area of triangle: (48 x 12) / 2 = 288

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3 years ago