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egoroff_w [7]
3 years ago
9

I need help asap!!!!!

Mathematics
1 answer:
tino4ka555 [31]3 years ago
6 0

Answer:34

Step-by-step explanation:

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Complete the identity
spin [16.1K]

Answer: cos(\pi-x)=-cos(x)

Step-by-step explanation:

We need to apply the following identity:

cos(A - B) = cos A*cos B + sinA*sin B

Then, applying this, you know that for cos(\pi-x):

cos(\pi-x)=cos(\pi)*cos(x)+sin(\pi)*sin(x)

We need to remember that:

cos(\pi)=-1 and sin(\pi)=0

Therefore, we need to substitute these values into cos(\pi-x)=cos(\pi)*cos(x)+sin(\pi)*sin(x).

Then, you get:

cos(\pi-x)=(-1)*cos(x)+0*sin(x)

cos(\pi-x)=-1cos(x)+0

cos(\pi-x)=-cos(x)

8 0
3 years ago
Evaluate u + xy, for u = 20, x = 9, and y = 8
elena-14-01-66 [18.8K]
This is how you work it out:
u + xy
Plug in your numbers that you know:
20 + 9 * 8
20 + 72
92
8 0
3 years ago
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Deffense [45]
Just multiply the numers given
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Given: ∠BCD ≅ ∠EDC and ∠BDC ≅ ∠ECD Prove: Δ BCD ≅ Δ EDC
never [62]
It would be bisecting angles
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Consider the line y=- 2x+7.
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Answer:

the slope is rhe same -2

Step-by-step explanation:

the slope is the opposite +1/2

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