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3 years ago

1-sen^{4} x - cos^{4} x = 2sen^{2} x cos^{2} x

Mathematics

1 answer:

Daniel [21]3 years ago

5 0

Answer:

Step-by-step explanation:

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Can you please answer the whole page I’ll give you all the points I have and Brainiest answer

MAVERICK [17]

QUESTION 1

The given circle has equation:

$x^2+y^2=16$

We can rewrite to obtain;

$(x-0)^2+(y-0)^2=4^2$

This is equation is now in the form;

$(x-h)^2+(y-k)^2=r^2$

Where (h,k)=(0,0) is the center of the circle and $r=4$ is the radius.

QUESTION 2

The center of the circle is at (1,1) and passes through the point (4,5).

The radius of this circle is given by;

$r=\sqrt{(4-1)^2+(5-1)^2}$

$r=\sqrt{(3)^2+(4)^2}$

$r=\sqrt{9+16}$

$r=\sqrt{25}$

$r=5$ units.

We substitute into the formula;

$(x-h)^2+(y-k)^2=r^2$

$(x-1)^2+(y-1)^2=5^2$

$(x-1)^2+(y-1)^2=25$

Expand if you wish;

$x^2-2x+1+y^2-2y+1=25$

$x^2+y^2-2x-2y+2-25=0$

$x^2+y^2-2x-2y-23=0$

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3 years ago

PLEASE HELP I WILL GIVE BRAINLIEST:)

kolezko [41]

Answer:

c is correct

Step-by-step explanation:

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3 years ago

Read 2 more answers

What is equivalent to -3(-2x + 7)

nata0808 [166]

Answer is A 6x - 21 as the -3 makes the -2x positive and 7 into a negative 21

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3 years ago

Read 2 more answers

Assume that 13% of people are left-handed. If we select 10 people at random, answer the following questions:

Anastasy [175]

Answer:

0.099, 0.969,0.87,8.3.1.063

Step-by-step explanation:

Let X be the left handed people in the sample of 10 people selected.

X is binomial with n=10 and p = 0.13

a) the probability that there are exactly 3 lefties in the group

= $P(x=3) = 10C3 (0.13)^3 (0.87)^7\\= 0.09945\\=0.099$

b) the probability that there are at least 3 lefties in the group

= $P(X\geq 3) =0.9687\\=0.969$

Now Y number of right handers is binomial with n =10 and p = 0.87

c) the expected number of right-handers in the group.

$=E(Y) = np\\= 10(0.83)\\=8.3$

d) the standard deviation of the number of right-handers in the group

= $\sigma Y = \sqrt{npq} \\=1.063485\\=1.063$

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3 years ago

Which of the following is the additive inverse of 4/31 ?

zhuklara [117]

Answer:

c 31b4

Step-by-step explanation:

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3 years ago