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2 years ago

Cos^2xcos^2x/2 -sin^2(x/2 -pi/4)sin^2x

Mathematics

1 answer:

Mazyrski [523]2 years ago

6 0

Evaluate: int (sin 2x)/sqrt(sin^4x+4 sin^2x-2) dx.

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Which table shows a proportional relationship between x and y?

IrinaK [193]

The correct answer is the last set of numbers

6 0

3 years ago

Simultaneous equations 5x+y=28 x+y=2

ludmilkaskok [199]

Answer:

Step-by-step explanation:

$5x + y = 28$

$x + y = 8$

Solve the equation for y by moving 'x' to R.H.S and changing its sign

$5x + y = 28$

$y = 2 - x$

Substitute the given value of y into the equation 5x + y = 28

$5x + 2 - x = 28$

Solve the equation for x

Collect like terms

$4x + 2 = 28$

Move constant to R.H.S and change its sign

$4x = 28 - 2$

Subtract the numbers

$4x = 26$

Divide both sides of the equation by 4

$\frac{4x}{4} = \frac{26}{4}$

Calculate

$x = \frac{26}{4}$

Reduce the numbers with 2

$x = \frac{13}{2}$

Now, substitute the given value of x into the equation y = 2 - x

$y = 2 - \frac{13}{2}$

Solve the equation for y

$y = - \frac{9}{2}$

The possible solution of the system is the ordered pair ( x , y )

-------------------------------------------------------------

Let's check if the given ordered pair is the solution of the system of equation:

plug the value of x and y in both equation

$5 \times \frac{13}{2} - \frac{9}{2} = 28$

$\frac{13}{2} - \frac{9}{2} = 2$

Simplify the equalities

$28 = 28$

$2 = 2$

Since , all of the equalities are true, the ordered pair is the solution of the system.

$(x \:, y \: ) = ( \frac{13}{2} \: , - \frac{9}{2})$

Hope this helps....

Best regards!!

5 0

3 years ago

Read 2 more answers

Find the product. <br><br> (6a + b) 2

I am Lyosha [343]

I think it is 36^2+12ab+b^2

8 0

3 years ago

Estimate the value of a 9% tip on a bill of $51.30.

Leokris [45]

Answer:

to round up you would tip $5

Step-by-step explanation:

because it’s a little over 50 and a little under 10

3 0

3 years ago

Ming throws a stone off a bridge into a river below. The stone's height (in meters above the water), xxx seconds after Ming thre

Kitty [74]

Answer:

45 m

Step-by-step explanation:

<h3>Given</h3>

<u>Function to produce the stone's height</u>

h(x)= -5(x-1)^2+45

Maximum value the given function can get is at (x - 1) = 0 ⇒ x = 1

because the -5(x - 1)² can get maximum value of zero as the square of any number is zero or positive

<u>So maximum height is </u>

h(-1) = 45 m

4 0

3 years ago