The value of cos 4x from the given identity is 0.999
<h3>Trigonometry identity</h3>
Given the cosine identity
cos8x = 13/36
Determine the value of x
8x = arccos(13/36)
8x = 0.36111
x = 0.36111/8
x = 0.04514
Determine the value of cos4x
cos4x = cos4(0.04514)
cos4(0.04514) = 0.999
Hence the value of cos 4x from the given identity is 0.999
Learn more trig identity here; brainly.com/question/7331447
Answer:
(2x+2)+(x+34)=180°[by linear pair]
3x+36=180°
3x=180°-36°
3x=144
x=144/3
x=48
The areas of the square pyramid are the amount of space on it
- The lateral surface area is 307.2 square cm
- The total surface area is 451.2 square cm
<h3>How to determine the lateral surface area?</h3>
The given parameters are:
Base (b) = 12 cm
Slant height (l) = 12.8 cm
The lateral surface area is calculated using:
L = 2bl
So, we have:
L = 2 * 12 * 12.8
Evaluate the product
L = 307.2
<h3>How to determine the total surface area?</h3>
This is calculated using:
T = L + b^2
So, we have:
T = 307.2 + 12^2
Evaluate
T = 451.2
Hence, the total surface area is 451.2 square cm
Read more about areas at:
brainly.com/question/24487155
Z= -24, i hope this helps :)
45-15= 30-28= 2+18=20
Is that what the question was asking??
