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4 years ago

What is the decimal value of cos X? (Round the answer to the nearest thousandth if necessary.)

Mathematics

1 answer:

Tanya [424]4 years ago

4 0

Answer:

0.153

Step-by-step explanation:

It has been a long time since I've done this, so I hope it is correct:

cos = adjacent side / hypotenuse

cos x = 13 / 85 = 0.153

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4 years ago

Factorise<br><br>a² - 144<br>Please factorise this

charle [14.2K]

Answer:

$\bf\pink{(a-12)\times (a+12)}$

Step-by-step explanation:

<h2><u>Given Expression</u> :-</h2>

$\bf\blue{a^{2} - 144}$

<h2><u>Steps to factorise</u> :-</h2>

$\longrightarrow\:\:\bf\red{a^{2} - 144}$

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$\longrightarrow\:\:\bf\purple{(a-12)\times (a+12)}$

(<u>Refer the attachment for graph representation</u>)

<h2><u>Graph Details</u> :-</h2>

$\bigstar\:\:\bf{y=a^{2}-144}$

$\rm{ Roots \:\:(-12,\:0)\:(12,\:0)}$

$\rm{Domain \:\:a \in {\mathbb{R}}}$

$\rm{Range \:\:y\in \bigg( -144,\:+\infty \bigg) }$

$\rm{Minimum \:\: (0,\:-144)}$

$\rm{Vertical\: Intercept\:\:(0,\:-144)}$

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