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NARA [144]
3 years ago
12

PLS HELP ASAP, I HAVE A D IN THIS CLASS

Mathematics
1 answer:
Vilka [71]3 years ago
6 0

I THINK its all real numbers like why else it there and i dont se nun that equal to 0

Step-by-step explanation:

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Prove that : sinA/1+cosA + 1+cosA/sinA=2cosecA​
tekilochka [14]

Step-by-step explanation:

\frac{sinA}{1+cosA} +\frac{1+cos}{sinA} =2cosec\\\\\\\frac{sin^{2}A+(1+cos)^{2}  }{sinA(1+cosA)} \\\\

\frac{sin^{2}A+1+cos^{2}+2cos}{sinA(1+cosA)} \\\\ and we have sin^{2}+cos^{2} =1

so \frac{1+1+2cosA  }{sinA(1+cosA)} \\\\

\frac{2+2cosA  }{sinA(1+cosA)} \\\\

\frac{2(1+cosA)}{sinA(1+cosA)} \\\\

\frac{2}{sinA} we have \frac{1}{sin}=cosec\\

<em>Finally </em>2cosecA<em />

<em>I really hope this helps coz it took much time </em>

3 0
3 years ago
I need this answer ASAP. Thank you in advance.
lianna [129]

Answer:

Step-by-step explanation:

? do you really

?

4 0
4 years ago
Er uvay, vvildt is your average velocity!
timurjin [86]

The acceleration of the fire truck is 1.666 m/s².

<u>Step-by-step explanation:</u>

Acceleration is the measure of change in velocity with respect to time. So as the initial velocity of the fire truck is given as 0 km/hr and the final velocity is given as 66 km/hr. So at first the truck is at rest and on switching on the engine, the truck gets to the velocity of 66 km/hr in 11 seconds.

        \text { Acceleration }=\frac{\text {Change in velocity}}{\text {time}}

But first the units of velocity should be changed from km/hr to m/s

1 hour = 3600 seconds

1 km = 1000 m

So, 66\ {k m}{h r}=\frac{66 \times 1000}{3600} m / s

Converted Velocity = 18.33 m/s

Then, the acceleration will be

\text { Acceleration }=\frac{18.33-0}{11}

Acceleration = 1.666 m/s²

So, the acceleration of the fire truck is 1.666 m/s².

5 0
4 years ago
Let f (x) = 9x^2 + 7 and g(x) = x + 2. (
My name is Ann [436]
I hope this helps you !

8 0
3 years ago
Each marble bag sold by Chris's marbles company contains 7 red marbles for every 5 orange marbles , if a bag had 30 orange marbl
Dmitry_Shevchenko [17]

Answer:

42

Step-by-step explanation:

To receive this answer:

  1. Divide the <u>30 orange marbles</u> with the <u>5 orange marbles</u>.

--This will give you 6

    2. Multiply 6 with 7.

--This will then give you 42.

  • Therefore, (with being checked...) 42 is the correct answer.
5 0
2 years ago
Read 2 more answers
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