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Virty [35]
2 years ago
10

3 sin 0 = 3 cos 20 what is the solution set?​

Mathematics
1 answer:
lutik1710 [3]2 years ago
8 0

Answer:

Step-by-step explanation:

3 sinθ=3 cos 2θ

sin θ=cos 2θ

sinθ=1-2sin² θ

2sin²θ+sin θ-1=0

2sin²θ+2sinθ-sinθ-1=0

2sin θ(sin θ+1)-1(sin θ+1)=0

(sin θ+1)(2 sin θ-1)=0

sin θ=-1=-sin 90=sin (180+90)

θ=270

or sin θ=1/2=sin 30,sin (180-30)

θ=30,150

solution set is {30,150,270}

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2 years ago
Solve 3x – ly= 11 and -2x – 4y=-26 by elimination
Ede4ka [16]

Answer:

(5, 4 )

Step-by-step explanation:

Given the 2 equations

3x - y = 11 → (1)

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7 0
2 years ago
Compute show all of your work: 8X4-4/2+1
Pepsi [2]
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5 0
3 years ago
50 Points. what is the value of x
amm1812

Answer:

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