2 years ago

What is a system of equations?

Mathematics

1 answer:

zlopas [31]2 years ago

5 0

Answer:

A system of equations is when two or more equations have the same variable(s) that you work with together.

Step-by-step explanation:

For these types of equations, we typically use substitution, elimination, and graphing.

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Read 2 more answers

If cos(-ϴ)=0.95, find sin(π/2-ϴ)

Furkat [3]

$\bf \textit{Cofunction Identities}
\\\\
sin\left(\frac{\pi}{2}-\theta\right)=cos(\theta)
\qquad 
cos\left(\frac{\pi}{2}-\theta\right)=sin(\theta)
\\\\\\
\stackrel{\textit{symmetry identities}}{cos(-\theta )=cos(\theta )}\\\\
-------------------------------\\\\
sin\left(\frac{\pi}{2}-\theta\right)=cos(\theta)=cos(-\theta )=0.95$