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OverLord2011 [107]
3 years ago
13

How did they get this

Mathematics
2 answers:
alexandr1967 [171]3 years ago
7 0
It's only true if  x=2  and  y= -1 .
katrin2010 [14]3 years ago
3 0
Somewhere in the text, it must say that x = 2 and y = -1 or else, the values just seem made up out of thin air. 
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What basic trigonometric identity would you use to verify that sinx cosx tanx=1-cos^2x
andre [41]

Answer:

sin^2x+cos^2x=1 is used to prove the given equation.

Step-by-step explanation:

We have given an equation:

sinx\cdot cosx\cdot tanx=1-cos^2x

We will consider right hand side first

tan x can be written as:

tanx=\frac{sinx}{cosx}

So, on substituting tan x in the left hand side of the given equation we get:

sinx\cdot cosx\cdot \frac{sinx}{cosx}

Cancel common term from denominator and numerator which is cosx we get

sin^2x

And we have an identity:

sin^2x+cos^2x=1

\Rightarrow sin^2x=1-cos^2x

Hence, right hand side is equal to sin^2x.


5 0
2 years ago
Read 2 more answers
Come on smart heads . Earn you some points with this easy problem . I know you can do it !!!
Anna [14]

{(x + 22)}^{2}
6 0
2 years ago
Frank is having the car pets in his house cleaned. The cost of the cleaning is calculated from the area of the carpets. C= the c
asambeis [7]

Answer:

Cost of the cleaning, C is the dependent variable

Area of the carpet, a is the independent variable

Step-by-step explanation:

cost of the cleaning is calculated from the area of the carpets

C= the cost of the cleaning a= the area of the carpets.

Cost of the cleaning, C is the dependent variable

Area of the carpet, a is the independent variable

A dependent variable is a variable which depends on other factors to exist. They take their values based on other factors. Their value is changed as a result of a change in independent variable

An independent variable is a variable which does not change as a result of the change in other factors. They take their values irrespective of external factors around them.

5 0
3 years ago
Janet lives in Miami and has low to moderate income. She wants to buy a home in Miami priced at $150,000 but doesn't have enough
Zina [86]

Answer:

Usda loans

Step-by-step explanation:

4 0
2 years ago
Please help!!!Its timed !!!!! Ill give out most brainly and extra points !!!
seropon [69]

Answer:

<h2>D)x=4,y=7</h2>

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • equation
  • PEMDAS
<h3>let's solve:</h3>

according to the question

\begin{cases}x + 29 = 7x + 5 \\ 8y - 35 =3y  \end{cases}

\begin{cases}x -7x= 5-29 \\ 8y - 3y=35 \end{cases}

\begin{cases}-6x= -24\\ 5y=35 \end{cases}

\begin{cases}\frac{-6x}{-6}=\frac{-24}{-6} \\ \frac{5y}{5}=\frac{35}{5} \end{cases}

\therefore \begin{cases}  x=4\\ y=7 \end{cases}

6 0
2 years ago
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