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Marina CMI [18]
3 years ago
8

Find x3 - 2y2 - 3x3 + z4 if x = 3, y = 5, and z = -3.

Mathematics
2 answers:
zloy xaker [14]3 years ago
6 0
So will be 27 -50 - 81 +81 = - 23

hope this will help you 
Goshia [24]3 years ago
3 0
Substitute the given values for x, y, and z in the expression,
                         x³ - 2y² - 3x³ + z^4
                         3³ - 2(5)² - 3(3³) + (-3)^4
The numerical value for the expression is -23. This is the third among the choices. 
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Answer:

1) The value of x= 0.0642

2) sin\theta=\frac{P}{H}=\frac{24}{25}

cos\theta=\frac{B}{H}=\frac{7}{25}

tan\theta=\frac{P}{B}=\frac{24}{7}

cosec\theta=\frac{H}{P}=\frac{25}{24}

cot\theta=\frac{B}{P}=\frac{7}{25}

Step-by-step explanation:

1) Given : A right angle triangle with sides x and 10 and angle is 50°

To find : Value of x

Solution : Since, it is a right angle triangle

Therefore, we apply cos\theta=\frac{B}{H}

Where Base = x, Hypotenuse= 10, angle = 50°

cos(50)=\frac{x}{10}

0.642=\frac{x}{10}

0.0642=x

The value of x= 0.0642

2) Given : sec\theta=\frac{25}{7}

To find : Value of sin\theta,cos\theta,tan\theta,cosec\theta,cot\theta

Solution : We have given sec\theta=\frac{25}{7}

sec\theta=\frac{H}{B}

so, B= 7 , H=25

By Pythagoras theorem,

H^2=P^2+B^2

25^2=P^2+7^2

625-49=P^2

\sqrt{576}=P^2

P=24

Now, P=24, B=7, H=25

sin\theta=\frac{P}{H}=\frac{24}{25}

cos\theta=\frac{B}{H}=\frac{7}{25}

tan\theta=\frac{P}{B}=\frac{24}{7}

cosec\theta=\frac{H}{P}=\frac{25}{24}

cot\theta=\frac{B}{P}=\frac{7}{25}



5 0
3 years ago
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