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3 years ago

(Sin5A/sina)-(cos5A/cosA)=4cos2A

Mathematics

1 answer:

Sonja [21]3 years ago

8 0

Is there any way you could explain this to me?

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What does (2+3) +4^2 x (5-3) equal

givi [52]

Answer:

Step-by-step explanation

Do what is in the parenthesis first

(5)+4^2x(2)

Exponents next

4^2=16

5+16x2

Multiplication next

16x2=32

You're left with the equation 5+32=37

6 0

3 years ago

Todd hired a handyman to replace some tiles in his bathroom. He paid him $24 per hour of work and $15 as a tip.

Citrus2011 [14]

He paid him : 24t + 15

for 3 hrs...
24(3) + 15 = 72 + 15 = $ 87

4 0

3 years ago

greta has 45 minutes before her job interview. she is 15 miles away from teh interview. how far must she drive to be on time for

Jlenok [28]

15 miles is how far she has to go. I think you have a Typo

3 0

3 years ago

Apple launches an ad campaign for iPhone 12. Managers want to know what is the % of social media mentions that have positive rea

Orlov [11]

Answer:

social media mentions do managers at Apple need to collect, if they want to get a margin of error of 2%

Sample size 'n' = 625

Step-by-step explanation:

Step(i):-

Given data Apple launches an ad campaign for iPhone 12

Managers want to know what is the % of social media mentions that have positive reactions to the new ad campaign

probability of positive reactions p = 1/2

Probability of negative reactions q = 1-p = 1/2

we know that $\sqrt{p(1-p}\leq \frac{1}{2}$

Step(ii):-

Given margin of error = 2 % =0.02

The margin of error is determined by

$M.E = \frac{\sqrt{p(1-p} }{\sqrt{n} }$

$0.02 = \frac{\frac{1}{2} }{\sqrt{n} }$

$\sqrt{n} =\frac{1}{2 X0.02}$

√n = 25

squaring on both sides, we get

n = 625

8 0

3 years ago

Help me pls its Pythagorean theorem I need help

ankoles [38]

Answer:

the answer is 3.81

but rounding it it will be 3.8 meters

Step-by-step explanation:

Pythagorean theorem says

a²+b²=c²

so,

take take the Lowest measurement as a² which will be 7 and take 8 as the hypotenuse or the longest side which is c²

then put it all together you get

7²+x²=8²

we made b as x because we will be finding b

then substitute the values

x²=8²-7²

x²=64-49

x²=15

to remove that square from the x you then put square root in both

✓x²=✓15

press in the calculator, root of 15 will be about 3.81

now we got

x=3.81

x is the missing measurement

8 0

3 years ago