3 years ago

Will give you brainly if you answer this

Mathematics

2 answers:

Bingel [31]3 years ago

8 0

It is the third one c

klemol [59]3 years ago

5 0

It’a the third , and can I have the brainliest too

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Suppose the temperature outside is dropping 3 degrees each hour. How much will the temperature change in 8 hours?

mamaluj [8]

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The temp will drop by 24 degrees in 8 hours

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Please help to solve this. Find sin5x,if sinx+cosx=1,4

MrMuchimi

Answer:

Hello,

Step-by-step explanation:

we must first remember that:

$\boxed{sin(5x)=5sin(x)-20*sin^3(x)+16*sin^5(x)}\\\\$

Let say t=sin(x)

$sin(x)+cos(x)=1.4\\\\t+\sqrt{1-t^2}=1.4\\\sqrt{1-t^2}=1.4-t\ we\ square\\1-t^2=1.4^2+t^2-2.8*t\\2t^2-2.8*t+0.96=0\\\Delta=2.8^2-4*2*0.96=0.16=0.4^2\\\\t=\dfrac{2.8-0.4}{4} =0.6\ or\ t=\dfrac{2.8+0.4}{4}=0.8\\\\t^3=0,216\ or\ t^3=0,512\\\\t^5=0,07776\ or\ t^5=0,32768\\\\\boxed{sin(5x)=5*0.6-20*0.216+16*0.07776=-0,07584}\\\\or\\\\\boxed{sin(5x)=5*0.8-20*0.512+16*0.32768=-0,99712}$