3 years ago

Jillian said √25 is irrational because it is a square root. Why is she wrong

Mathematics

2 answers:

PtichkaEL [24]3 years ago

7 0

Answer:

She is wrong because the answer is 5 and that is rational

Step-by-step explanation:

o-na [289]3 years ago

5 0

Square roots are rational and it equals 5 and 5 is rational

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Find the exact value. if the expression is undefined write undefined. csc 135°

Pepsi [2]

$\bf csc(\theta)=\cfrac{1}{sin(\theta)}\\\\
-----------------------------\\\\
csc(135^o)\implies \cfrac{1}{sin(135^o)}\implies \cfrac{1}{\frac{\sqrt{2}}{2}}\implies \cfrac{\frac{1}{1}}{\frac{\sqrt{2}}{2}}\implies \cfrac{1}{1}\cdot \cfrac{2}{\sqrt{2}}\implies \cfrac{2}{\sqrt{2}}
\\\\\\
\textit{now, rationalizing the denominator}
\\\\\\
\cfrac{2}{\sqrt{2}}\cdot \cfrac{\sqrt{2}}{\sqrt{2}}\implies \cfrac{2\sqrt{2}}{(\sqrt{2})^2}\implies \cfrac{2\sqrt{2}}{2}\implies \boxed{\sqrt{2}}$