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elena-s [515]
3 years ago
13

Can someone give me answers?

Mathematics
2 answers:
Alenkasestr [34]3 years ago
7 0

Answer:

Maybe if you give a better quality photo that isn't sideways! :D

Step-by-step explanation:

Len [333]3 years ago
6 0

Answer:

81.6

Step-by-step explanation:

C = 3.14(2x13)

C = 3.14 x 26

C = 81.64

Rounded to the nearest tenth = 81.6 Inches

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If t a n squared θ = 3 /8 , what is the value of  s e c θ
TEA [102]

We can use 3 facts:

\tan{\theta}=\frac{y}{x}

\sec{\theta}=\frac{r}{x}

x^2+y^2=r^2

So, to find our x and our y we can do:

\tan^2{\theta}=\frac{3}{8} \implies \\ \tan{\theta}=\pm{\sqrt{\frac{3}{8}}=\pm\frac{\sqrt{3}}{\sqrt{8}}So, now that we know our x and our y we can find our r.

(\sqrt{3})^2+(\sqrt{8})^2=11 \implies r=\sqrt{11}

You'll notice, though, that there were two solutions for \tan{\theta}, which means we have a positive and a negative for our x. So:

\sec{\theta}=\frac{\sqrt{11}}{\sqrt{8}} \\ \sec{\theta}=-\frac{\sqrt{11}}{\sqrt{8}}}\\ \text{Rationalizing both of them:}\\ \sec{\theta}=\frac{\sqrt{88}}{8} \\ \sec{\theta}=-\frac{\sqrt{88}}{8}

7 0
3 years ago
Read 2 more answers
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