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3 years ago

Help I need the answer dont send NO FILE only answer if you know it step by step explanation

Mathematics

2 answers:

Jlenok [28]3 years ago

7 0

Answer:

(0,4)

Step-by-step explanation:

Nady [450]3 years ago

4 0

this question is a little confusing but it might be 0,4

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Use the unit circle to find cot 225°

SCORPION-xisa [38]

Answer:

$\cot 225\degree=1$

Step-by-step explanation:

We want to use the unit circle to find the value of $\cot 225\degree$ .

Note that $225\degree$ is in the third quadrant.

This makes an angle of $45\degree$ with the positive x-axis.

$\cot 225\degree=\frac{\cos225\degree}{\sin225\degree}$

$\cot 225\degree=\frac{-\cos45\degree}{-\sin45\degree}$

On the unit circle;

$\cos 45\degree=\sin 45\degree=\frac{\sqrt{2} }{2}$

$\cot 225\degree=\frac{-\frac{\sqrt{2}}{2}}{-\frac{\sqrt{2}}{2}}$

$\cot 225\degree=1$

7 0

3 years ago

14. 2057 Q.No. 1(a) Sum to infinity: 1 + 3x + 5x2 + 7x3 +... (-1<x<1).

aleksandrvk [35]

The sum appears to be

$\displaystyle\sum_{n=0}^\infty(2n+1)x^n$

I'll assume you want to find out what function this sum converges to.

Let

$f(x)=\dfrac1{1-x}=\displaystyle\sum_{n=0}^\infty x^n$

with -1 < x < 1. Differentiating gives

$f'(x)=\dfrac1{(1-x)^2}=\displaystyle\sum_{n=0}^\infty nx^{n-1}=\sum_{n=1}^\infty nx^{n-1}=\sum_{n=0}^\infty(n+1)x^n$

So we have

$\displaystyle\sum_{n=0}^\infty(2n+1)x^n=f'(x)+xf'(x)$

$\displaystyle\sum_{n=0}^\infty(2n+1)x^n=\frac{1+x}{(1-x)^2}$

5 0

4 years ago

Simplify: 8x4 – 3x – 7 = [?] x=-1

zimovet [89]

Answer:

Step-by-step explanation:

8×(-1)⁴-3×(-1)-7=8+3-7=4

4 0

3 years ago

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Please help!!! ( 1 ) 75% of z is 25 ( 2 ) 15% of z = ?

Wewaii [24]

it is 7.5 .....................

8 0

3 years ago

8 less than the product 13 times a number x is less than or equal to −32.

grandymaker [24]

13x - 8 < = -32
13x < = -32 + 8
13x < = - 24
x < = -24/13

6 0

4 years ago

Read 2 more answers