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soldi70 [24.7K]
3 years ago
10

Simplify [2 (cos 210 + i sin 210)]^2

Mathematics
1 answer:
Andru [333]3 years ago
4 0
2{(cos^210+isin^210)}^2

2(cos^210-sin^10+2i*cos10*sin10)

2(cos20+i*sin20)

cos^2Ф-sin^2Ф=cos2Ф and 2sinФcosФ=sin2Ф here Ф=10°

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Please answer! Only if correct, please.
marta [7]

Answer:

f(-4) = -6

g(2) = -14

Step-by-step explanation:

To evaluate a function we must plug in the values of x. So for:

f(x) = 2x+2

we have:

f(-4) = 2(-4)+2

then we simplify:

f(-4) = -8+2

so f(-4) = -6

Now the same steps are taken for g(x) in which the answer would be -14.

6 0
3 years ago
How do I solve out 5x188
mihalych1998 [28]

Answer:

940

Step-by-step explanation:

 188

<u>×    5</u>

 940

--------------------------------------------------------

8 * 5 = 40

Carry the 4 to the next 8

8 * 5 = 40

Add the 4 to the 40

40 + 4 = 48

Carry the 4 to the 1

1 * 5 = 5

Add the 4

5 + 9

= 940

*Hope this helps .^.*

5 0
3 years ago
Covert 35 cm/sec to 21 m/min
Alisiya [41]
1 m=1000cm, so 21m=2100cm
1min=60sec
so  21 m/min=2100сm/60sec=35cm/sec


3 0
3 years ago
What is this answer? :)
sergey [27]

Answer:

the answer is b

Step-by-step explanation:

6 0
3 years ago
The gift shop at manatee mall was having a clearance sale. Everything was marked down 30%. The original price of a manatee hat w
sergeinik [125]

Answer

Find out the what is the clearance price of a manatee.

To prove

As given

The gift shop at manatee mall was having a clearance sale.

Everything was marked down 30%.

The original price of a manatee hat was $12.

30 % is written in the decimal form.

= \frac{30}{100}

= 0.30

30% of the original price of a manatee = 0.30 × 12

                                                                 = $ 3.6

Clearance price = original price - 30% of the original price

                          = 12 - 3.6

                        = $ 8.4

Therefore the clearance price be $8.4 .

3 0
3 years ago
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