3 years ago

Help this is due tomorrow

Mathematics

1 answer:

In-s [12.5K]3 years ago

5 0

Answer:

X=15

Step By Step Explanation:

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Liula [17]

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Step-by-step explanation:

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Find <br> (2x + 4)(2x - 4).

jenyasd209 [6]

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Step-by-step explanation:

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4 years ago

Read 2 more answers

Find the values of cosΘ and tanΘ, given that sinΘ = 8/9 and Θ is in quadrant I

Misha Larkins [42]

$sin^2 \alpha +cos^2 \alpha =1\ \ \ and\ \ \ tan \alpha = \frac{\big{sin \alpha }}{\big{cos \alpha }} \\\\sin \alpha = \frac{8}{9}\\\\ \Rightarrow\ \ \ (\frac{8}{9})^2+cos^2 \alpha =1\ \ \ \Rightarrow\ \ \ cos^2 \alpha =1- \frac{64}{81} \ \ \ \Rightarrow\ \ \ cos^2 \alpha = \frac{17}{81} \\\\ \alpha \ \in\ (0^0;90^0)\ \ \ \Rightarrow\ \ \ cos \alpha >0\ \ \ \Rightarrow\ \ \ cos \alpha = \frac{ \sqrt{17} }{9} \\\\$

$tan \alpha = \frac{8}{9}: \frac{ \sqrt{17} }{9} =\frac{8}{9}\cdot \frac{9}{\sqrt{17}}= \frac{8}{\sqrt{17}}= \frac{8\cdot \sqrt{17}}{\sqrt{17}\cdot \sqrt{17}}=\frac{8\cdot \sqrt{17}}{17}$

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4 years ago