I need help on this if you would like (:

Mathematics

2 answers:

Vlada [557]3 years ago

8 0

I recommend that you download "Symbolab" is a good application for math.

Rainbow [258]3 years ago

6 0

Answer:

b. 1/3

Step-by-step explanation:

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Someone pls help me with this I will make you brain

andrew11 [14]

Answer:

You didn'ttell us the question

Step-by-step explanation:

where is the question?

5 0

2 years ago

Help last question I’ll tell y’all my score!

Rudiy27

Answer:

Step-by-step explanation:

graph shows

postcards=15

shirts=10

pencils= 40

we're going to add postcards and shirts THEN comparing it to pencils

postcards and shirts=15+10= 25

pencils= 40

answer=40-25=15

5 0

3 years ago

Use the squared identities to simplify 2sin^2xcos^2x

Rainbow [258]

$\bf sin^2({{ \theta}})=\cfrac{1-cos(2{{ \theta}})}{2}\qquad \qquad 

cos^2({{ \theta}})=\cfrac{1+cos(2{{ \theta}})}{2}\\
-----------------------------\\
thus
\\\\
2sin^2(x)cos^2(x)\implies \boxed{2}\cdot \cfrac{1-cos(2{{ x}})}{\boxed{2}}\cdot \cfrac{1+cos(2{{ x}})}{2}
\\\\
\cfrac{1-cos(2{{ x}})}{1}\cdot \cfrac{1+cos(2{{ x}})}{2}\implies 
\cfrac{[1-cos(2x)][1+cos(2x)]}{2}\\
-----------------------------\\
\textit{now recall}\implies \textit{difference of squares}
\\ \quad \\
$

$\bf (a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)\\
-----------------------------\\
thus
\\\\
\cfrac{[1-cos(2x)][1+cos(2x)]}{2}\implies \cfrac{1^2-cos^2(x)}{2}
\\\\
 \cfrac{1-cos^2(x)}{2}\impliedby 
\begin{array}{llll}
\textit{pretty sure you know what that numerator is}\\
\textit{check your pythagorean identities}
\end{array}$