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Nady [450]
4 years ago
10

Is there a difference between y=cos^-1(x) and y=(cos x)^-1?

Mathematics
1 answer:
NeX [460]4 years ago
8 0
\cos^{-1}x could be used to denote the inverse cosine function, while (\cos x)^{-1} probably instead refers to the reciprocal cosine function, i.e. the secant function.

In general, \cos^{-1}x\neq(\cos x)^{-1}, but it's not unheard of for them to mean the same thing, especially in a context where something like \arccos x is used explicitly to denote the inverse function. I'd be careful about assuming they are always the same.
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Can someone solve this for me?
Sav [38]

Answer:

9

Step-by-step explanation:

9 is 3/4*12.

3 0
3 years ago
the area of a trapezoid is 36 square inches. The height is 4 inches and one bases twice the length of the other base. What are t
vlada-n [284]
The formula for this is A= \frac{1}{2} ( b_{1} + b_{2} )h.  Filling in accordingly, 36= \frac{1}{2}(x+2x)(4).  This simplifies to 36= \frac{1}{2}(3x)(4) and 36=6x.  Therefore, x = 6 so the bases are 6 and 12.
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3 years ago
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Help please I’m not sure how to do this
joja [24]

the answer for this would be the last one. two rays that meet at a end point.

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3 0
4 years ago
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Solve for z<br> 3z-5+2z=25-5z
iren [92.7K]

Answer:

z=3

Step-by-step explanation:

Add 3z and 2z

5z-5=25-5z

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3 0
3 years ago
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Emmet has $90 in a savings account that earns 10% interest, compounded annually.
STatiana [176]

Answer:

108.90

Step-by-step explanation:

You start with finding  

10

%

of  

90

.

$

90

⋅

.1

=

$

9

You add the money and the interest to get  

$

99

for the first year. However, the next year is different. It's compound interest, so you have to multiply  

10

%

by  

$

99

.

$

99

⋅

.1

=

$

9.90

$

99

+

$ 9.90

= $  108.90   The total would then be  $

108.90  i think lol

3 0
3 years ago
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