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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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Using f(x) = 2x + 7 and g(x) = x - 3, find f(g(x)).
Eva8 [605]

Answer:

2x+1

Step-by-step explanation:

that's a hard question

we know that g(x)= x-3

so f(g(x))= f(x-3)

we put it in the equation :

f(x-3)= 2(x-3) +7 = 2x-6+7 = 2x +1

6 0
3 years ago
Two numbers are in the ratio 3:7
lbvjy [14]

Answer:

98 And 18 i think

Step-by-step explanation:

8 0
3 years ago
-3(4x+5) please help<br>​
Natasha_Volkova [10]
Answer:
-12x-15
explanation:
you multiply -3 by 4x, gives u -12x and then you multiply -3 by 15 which gives you -15
then you put it in an equation
-12x-15
7 0
3 years ago
What is the final amount if 588 is decreased by 3% followed by a 6% increase?
Kaylis [27]

Answer:

604.58

Step-by-step explanation:

because hegarty says its 604.58

8 0
3 years ago
PLEASE HELP I WILL GIVE BRAINLIEST MUST USE WORK :)
Nikolay [14]

slope = (y2-y1)/(x2-x1)

m =(-2-7)/(8-0)

m =(-9/8)

slope is -9/8

the y intercept is 7   (0,7)

y = mx +b

y = -9/8 x+7

Answer: y = -9/8x +7

6 0
3 years ago
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