3 years ago

What is the value of 2cos2(105⁰) − 1?

Mathematics

2 answers:

uysha [10]3 years ago

4 0

Step-by-step explanation:

-1 - root3

Liula [17]3 years ago

3 0

Answer:

A) -√3/2

Step-by-step explanation:

edge 2020

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Benny bought six new baseball trading cards to add to his collection . The next day his dog ate half of his collection. There ar

KIM [24]

90 because if his dog ate half his cards and benny had 45 left that means 45 times two equals 90 because the dog ate HALF of 90

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3 years ago

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kakasveta [241]

Answer:

5 × $\frac{1}{100}$

Step-by-step explanation:

$4*100+2*10+3*1+6*\frac{1}{10}+x+9*\frac{1}{1000}=423.659\\4*100+2*10+3*1+6*0.1+x+9*0.001=423.659\\400+20+3+0.6+x+0.009=423.659\\423.609+x=423.659\\x=0.05\\\\50*\frac{1}{10}=5\\\\5*\frac{1}{100}=0.05\\\\50=50\\\\5*0.05=0.25$

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Answer:

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3 years ago

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the vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

ser-zykov [4K]

Answer:

45+10x = y

Step-by-step explanation:

$45 -- stays the same no matter what so that's constant.

$10 -- this varies dependent on the number of vaccinations your dog needs, so you'd use a variable to represent the number of vaccinations (in this case I'm using variable "x").

So, for example if your dog needed 7 vaccinations, it would be: 45+10(7) = y -- answer being $115.

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3 years ago

For the function given, state the middle line; f(t) = 40cos (80t + 20)

Digiron [165]

In the standard form of the equation

$\\ \ f(t)=Acos[b(t\pm c)]+k\\ \\$

The middle line =k

For our given problem

f(t) = 40cos (80t + 20)

On comparison we get k=0

Hence middle line=0

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3 years ago