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mash [69]
3 years ago
7

Which value is a solution for the equation tan x/2 = -1?

Mathematics
2 answers:
Luba_88 [7]3 years ago
4 0

Answer:

D

Step-by-step explanation:

What we have to do is to find the arc tan

x/2 = arc tan (-1)

tan is negative on the 4th and second quadrant

arc tan (-1) = 135 or 315

pi is 180 degrees

so we have;

135 is 3 pi/4

multiplied by the 2

= 6 pi/4 which is 3 pi/2

315 is 7 pi/4 which is same as 7 pi/2 when we multiply by 2

zysi [14]3 years ago
3 0

Answer:

the answer is d

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kherson [118]

Answer:

D) 82 units

Step-by-step explanation:

ΔBCD ≅ ΔEFG

In congruent triangles, corresponding parts are congruent

BD  = EG

4x - 9 = 2x + 15

4x - 9 -2x = 15

2x - 9 = 15

    2x = 15 +9

    2x = 24

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      x = 12

EG =  2x + 15 = 2*12 + 15

     = 24 + 15

EG = 39 units

FE = CB =   17 units

Perimeter of ΔEFG = FE + EG + GF

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8 0
3 years ago
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Answer:

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Step-by-step explanation:

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2x - 6 - 4x - 4  Re-arrange

2x - 4x - 6 - 4

-2x - 10

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Answer:

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Step-by-step explanation:

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