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Law Incorporation [45]
3 years ago
12

Cos2a.cos3a-cos2a.cos7a/sin4a.sin3a-sin2a.sin5a ​

Mathematics
1 answer:
Dmitrij [34]3 years ago
5 0

Answer is -28.37

Step-by-step explanation:

from the numerator cos 2a×cos 3a - cos 2a×cos7a= cos6a^2 -cos 14a^2

= -cos8a^2 for the numerator

from the denominator;

sin4a×sin3a-sin2a×sin5a= sin12a^2 -sin10a^2

= sin2a^2

therefore, combining the equation it gives; -cos8a^2/sin2a^2

a^2 will divide each other,

= -cos8/sin2.

from the calculator,

= - 0.9903/0.0349

= -28.37

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Below is by year:
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5 0
3 years ago
Find the area of the shape shown below.
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3 years ago
Jake is a factory manager for a company that produces batteries. Occasionally, some are found to be defective. Based on previous
Aleksandr [31]

Based on the estimated number of defective batteries and the number of batteries that were actually defective, the percent error of Jake's estimate is 20%

<h3>How to find the percent error?</h3>

The percent error of a problem can be found by the formula:
= (Expected results - Actual results) / 100%

Expected results = 12 defective batteries

Actual results = 10 defective batteries

Jake's percentage error is therefore:

= (12 - 10) / 100%

= 2 / 10 x 100%

= 0.2 x 100%
= 20%

In conclusion, the percent error of Jake's estimate is 20%.

Find out more on percent error at brainly.com/question/5493941

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7 0
1 year ago
What is the equation of the line that passes through (-1, 5) and (3, -7)?
enyata [817]

Answer:

3x + y = 2

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y - 5 = \dfrac{-12}{4}(x + 1)

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A segment has endpoint X and Z what are the two names of the segment?
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Segment XZ and segment ZX

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