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Dmitriy789 [7]
2 years ago
8

Tell whether the system is no solution, one solution or infinitely many solutions. y = 2x - 4 , y = 2x - 4

Mathematics
1 answer:
Arisa [49]2 years ago
5 0

it's the same equation, meaning it has infinite solutions

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1+sinx+cosx/1+sinx-cosx=1+cosx/sinx help pls by proving
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Answer:

Below.

Step-by-step explanation:

I'll  write sin x as s and cos x as c so we have:

(1 + s +c)/(1 + s - c) = (1 + c)/s

Cross multiplying:

s + s^2 + cs  = 1 + s - c + c + cs - c^2

s  + s^2 + cs = 1 + s + cs - c^2

s^2 + c^2 + s - s + cs - cs = 1

s^2 + c^2 = 1.

- that is sin^2 x + cos^2 x = 1 which is a known identity.

Therefore the original identity is proved.

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2 years ago
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