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4 years ago

6

What is maximum value of y=cosx

1 answer:

Mnenie [13.5K]4 years ago

4 0

y=cosx has a maximum value of positive 1

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4 years ago

a side if the triangle below has been extended to form an exterior angle of 130° . find the value of x

11111nata11111 [884]

Step-by-step explanation:

So, you have to get angle under 130° angle:

180°-130°= 50°

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3 years ago

It takes a crew 57 hours to install cabinets in one office. How long will it take the crew to install cabinets in 17 offices?

brilliants [131]

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3 years ago

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AlladinOne [14]

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3 years ago

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Find the sum of a finite geometric sequence from n=1 to n=8, using the expression -2(3)^n-1

MissTica

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}
\end{cases}
\\\\\\
\sum\limits_{n=1}^{8}~-2(3)^{n-1}~~
\begin{cases}
n=8\\
a_1=-2\\
r=3
\end{cases}\implies S_8=-2\left( \cfrac{1-3^8}{1-3} \right)
\\\\\\
S_8=\underline{-2}\left( \cfrac{1-6561}{\underline{-2}} \right)\implies s_8=1-6561\implies S_8=-6560$

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4 years ago