3 years ago

What are some expressions that equals 3x-4

Mathematics

1 answer:

Misha Larkins [42]3 years ago

8 0

1/2(6x-8) could be one

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Need help with some inverse trigonometric expressions, rounded to the nearest degree.

rjkz [21]

A Google or Bing search box can be your friend, if you don't have a calculator with inverse trig functions. Most calculators that have trig functions also have the inverse functions, usually after a 2nd or "shift" key. Often, there is a mode setting for degrees or radians.

arcsin(0.33) ≈ 19°
arccos(0.47) ≈ 62°
arctan(1.21) ≈ 50°
arcsin(0.82) ≈ 55°

6 0

3 years ago

If f(x)=ln(sin(2x)), f''(π/4) is equal to

Licemer1 [7]

Use the chain rule to compute the second derivative:

$f(x)=\ln(\sin(2x))$

The first derivative is

$f'(x)=(\ln(\sin(2x)))'=\dfrac{(\sin(2x))'}{\sin(2x)}=\dfrac{\cos(2x)(2x)'}{\sin(2x)}=\dfrac{2\cos(2x)}{\sin(2x)}$

$f'(x)=2\cot(2x)$

Then the second derivative is

$f''(x)=(2\cot(2x))'=-2\csc^2(2x)(2x)'$

$f''(x)=-4\csc^2(2x)$

Then plug in π/4 for x :

$f''\left(\dfrac\pi4\right)=-4\csc^2\left(\dfrac{2\pi}4\right)=-4$

4 0

4 years ago

Use one or more properties to rewrite the expression as an equivalent expression that does not use parenthesis. (5+10p)+13. A. 2

bulgar [2K]

It will be D. because you have to add the like terms which is 13 + 5 which will be 18 and so 10p doesn't have no like terms it just stays the same so it will be 10p+18

7 0

3 years ago

Evaluate x if: (i) 36x = 782 - 42

Ratling [72]

Answer:

36x=740

x=740/36

x=20.55

Hope it helps

5 0

3 years ago

Which is the correct answer? A) 3.41 m B) 2.29 m C) 1.59 m D) 2.71 m

PtichkaEL [24]

Answer:

its b or c ( im not for sure tho)

Step-by-step explanation:

5 0

3 years ago