All categories

2 years ago

Find the cosine 315º. Round your answers to the nearest hundredth if necessary. 0 0.71 1 –0.78

Mathematics

2 answers:

Fofino [41]2 years ago

7 0

Cos 315° is about 0.71.

DerKrebs [107]2 years ago

3 0

Answer:

Cos(315) = 0.711.

Step-by-step explanation:

Given : cosine 315º.

To find : Round your answers to the nearest hundredth.

Solution : We have given that cosine 315º.

Cos x = Sin (90- x).

Then

Cos ( 315) = Sin(90 -315)

Cos(315) = Sin (-225)

By the property Sin(-x) = -Sin(x)

Cos(315) = -Sin (225)

Cos (315) = $\frac{\sqrt{2}}{2}$

Cos(315) = 0.70711.

Therefore,Cos(315) = 0.711.

You might be interested in

If -1 is one of the zeroes of py 3x^3-5x^2-11x-3 find other zeroes

katrin2010 [14]

Given:

The function is:

$y=3x^3-5x^2-11x-3$

It is given that -1 is a zero of the given function.

To find:

The other zeroes of the given function.

Solution:

If c is a zero of a polynomial P(x), then (x-c) is a factor of the polynomial.

It is given that -1 is a zero of the given function. So, $(x+1)$ is a factor of the given function.

We have,

$y=3x^3-5x^2-11x-3$

Split the middle terms in such a way so that we get (x+1) as a factor.

$y=3x^3+3x^2-8x^2-8x-3x-3$

$y=3x^2(x+1)-8x(x+1)-3(x+1)$

$y=(x+1)(3x^2-8x-3)$

Again splitting the middle term, we get

$y=(x+1)(3x^2-9x+x-3)$

$y=(x+1)(3x(x-3)+1(x-3))$

$y=(x+1)(3x+1)(x-3)$

For zeroes, $y=0$ .

$(x+1)(3x+1)(x-3)=0$

$(x+1)=0$ and $3x+1=0$ and $x-3=0$

$x=-1$ and $x=-\dfrac{1}{3}$ and $x=3$

Therefore, the other two zeroes of the given function are $-\dfrac{1}{3}$ and $3$ .

3 0

2 years ago

Determine if the following event is mutually exclusive:

sp2606 [1]

Answer:

Ask yourself: "Can I roll a prime number and an odd number at the same time?"

Since the answer is "yes it is possible" (eg: rolling a 3), this means the two events are not mutually exclusive. Mutually exclusive events have nothing in common.

In terms of a venn diagram, mutually exclusive events have no overlapping shared region.Step-by-step explanation:

6 0

2 years ago

Please help me i need the answer asap

kupik [55]

Answer: Man sorry I don’t know how to solve that go to a math solver or something

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

If the area of the parallelogram is 15 cm 2, what is the area of the green triangle?

Mashutka [201]

Answer:

8cm

Step-by-step explanation:

6 0

2 years ago

Can someone please help me answer this because it is due in a couple of minutes. Please help

Mama L [17]

Answer:

X=-2

Step-by-step explanation:

Hope it helps

4 0

2 years ago