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ser-zykov [4K]
3 years ago
10

Plz help me and explain how you got the answer plz

Mathematics
1 answer:
AfilCa [17]3 years ago
3 0
The decrease was 3.  (from 30 down to 27)

Always calculate the decrease as a percent of the ORIGINAL number.

        3/30  =  0.1

To change a decimal to a percent, move the point 2 places that way ==> .

                 0.1  =  10% .

When you go from 30 to 27, that's a decrease of 10% .
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3 years ago
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34kurt
The solution for proving the identity is as follows:

sin(2A) = sin(A + A) 
As sin(a + b) = sinacosb + sinbcosa, 
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</span>
<span>Therefore, sin(2A) = 2sinAcosA

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your inquiries and questions soon. Have a nice day ahead!
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2 years ago
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djverab [1.8K]

Answer:

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3rd one I think tho it may not be accurate
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Read 2 more answers
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