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EastWind [94]
2 years ago
13

Help please thank you​

Mathematics
1 answer:
viktelen [127]2 years ago
8 0
  • p< -21

Step-by-step explanation:

I think it helps you!!

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XVerify the identity. (7 points) cos 4u = cos22u - sin22u
Alexandra [31]

Answer:

cos 4u = co^s2 2u - sin^2 2u

Step-by-step explanation:

cos 4u = co^s2 2u - sin^2 2u

Let 4u = 2x

cos 2x = cos^2 x - sin^ 2 x

cos (x+x) = cos^2 x - sin^ 2 x

Using cos(x+y) = cos(x)cos(y) -sin(x)sin(y)

cos(x) cos(x)- sin(x) sin (x)= cos^2 x - sin^ 2 x

cos^2 (x) -sin^2 (x) =cos^2 x - sin^ 2 x

Since this is true

cos 2x = cos^2 x - sin^ 2 x

This is true

Substituting 4u back for 2x

cos 4u = co^s2 2u - sin^2 2u

This is true

5 0
3 years ago
Hold 0.45 ounce. how many more ounces does a bottle of nail polish hold?
Tamiku [17]
0.8-0.45=0.35
The bottle of nail polish can hold 0.35 more ounces
5 0
3 years ago
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Original price of an apple watch: $299.00 Sales Tax: 7%​
bixtya [17]

20.93 is 7% of that

7 0
2 years ago
A thread was folded in half twice. Then, it was cut in a random place. One of the pieces is 8cm, and the longest piece is 18cm.
Elena-2011 [213]

Answer:

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Step-by-step explanation:

5 0
2 years ago
A train travels in a straight path at a steady speed of 1.25 miles per minute. At noon, the train is 100 miles from the starting
Leto [7]
We'll take 1.25 miles as one minute (x) and take 100 as total distance (D) while T is the time it took to reach that distance.
T = D/x
putting the values in
T = 100/1.25
T = 80
80 minutes is the answer.
4 0
2 years ago
Read 2 more answers
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