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vagabundo [1.1K]
3 years ago
11

Prove that cos(2????) = 2cos2(????) − 1 for any real number ????.

Mathematics
1 answer:
Over [174]3 years ago
6 0

Answer:

Sure

Step-by-step explanation:

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The graph shows Ms. Padilla's monthly cell phone cost, where x is the number of minutes she uses the phone during the month.
balu736 [363]

Answer: the X intercept mean this here

Ms.

Padilla is charged $0.04/min.

Ms. Padilla pays $16 for months she makes 0 min of calls

Step-by-step explanation:

7 0
1 year ago
Colin was thinking of a number. Colin subtracts 5 from it and gets an answer of 10.7. What was the original number?
Gemiola [76]

Answer:

15.7

Step-by-step explanation:

10.7 + 5 = 15.7

ovjiyxyrasyrcgihuzyigddhc

8 0
2 years ago
Find x for the problem
oee [108]

Answer:

14.4

Step-by-step explanation:

sin x = 24/30

x = sin^-1 (24/30) = 53.13

sin 53.13 = x/18

x = sin 53.13 x 18 = 14.4

6 0
2 years ago
Kensington City Cafe recently introduced a new flavor of coffee. They served 28 grande cups
Dmitrij [34]

Answer:

jumbo 23 oz, grande 16 oz

Step-by-step explanation:

Use g for grande and j for jumbo

The first equation: 28g + 33j = 1207

The second equation: 28g + 53j = 1667

Subtract the first from the second

   28g + 53j = 1667

-   28g + 33j = 1207

Equal 20j = 460

j = 23

Put 23 in for j in either equation and solve for g:

28g + 33(23) = 1207

28g + 759 = 1207

28g = 448

g = 16

5 0
2 years ago
The Roaming Cell Phone Company charges $15.00 per month plus $0.20 per minute of
Lostsunrise [7]

Answer:

$15 + x = $

Step-by-step explanation:

4 0
3 years ago
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