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Mrrafil [7]
3 years ago
5

What is the correct answer for both ? ​

Mathematics
2 answers:
lakkis [162]3 years ago
4 0

Answer:

19. Option A

20. Option B

Step-by-step explanation:

yulyashka [42]3 years ago
4 0
Answer of 19 is A by using the a^2 - b^2 = ( a - b) ( a + b) so this will be (r-1 )( r+1) because we have r^2 so we have to factorize it


Answer of 20 is B by following the same steps
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slega [8]

Answer:

The equation to this question is "x^2+y^2=16"

Step-by-step explanation:

Given value:

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\to x^2+y^2= 16 \cos^2 t +16 \sin^2 t\\\\\to x^2+y^2= 16 (\cos^2 t +\sin^2 t)\\\\\therefore (\cos^2 t +\sin^2 t =1)\\\\\to x^2+y^2= 16 (1)\\\\\to x^2+y^2= 16\\\\\to z=1

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mash [69]

Answer:

<h2>67.7</h2><h2 />

Step-by-step explanation:

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Answer:

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