Which sum or difference identity would you use to verify that cos (180° - q) = -cos q?
Answers
Answer:
Step-by-step explanation:
Given :
We have to write which identity we will use to prove the given statement.
Consider
Take left hand side of given expression
We know
Comparing , we get, a= 180° and b = q
Substitute , we get,
Also, we know and
Substitute, we get,
Simplify , we get,
Hence, use difference identity to prove the given result.
First you would use the sum and difference formula of
cos(a – b) = cos(a)cos(b) + sin(a)sin(b) because you have a difference inside the parentheses for cosine.
Hope this helps.
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(5,?) is on the line below. Find the other half of the coordinate. y = 2/3x + 7
Apartment A rents for $600 per month and includes heat and electric. Apartment B rents for $400 per month but heat and electric are not included. Electric averages $40 per month. Heat costs for last year totaled $800. Which apartment is cheaper?
Answers
I see 'X's marked next to the two answers. If those mean that
your answers were marked 'wrong', then I think the problem is this:
-- The top one should have been "10:00 AM".
-- The bottom one should have been "10:39 PM".
Answers
Answer:
The current is 5.64 Ampere when resistance is 768 ohms .
Step-by-step explanation:
As given
The current (I) in an electrical conductor varies inversely as the resistance (R) of the conductor.
Thus
Where k is the constant of proportionality .
The current is 6 amperes when the resistance is 722 ohms.
I = 6 amperes
R = 722 ohms
Put all the values in the formula
k = 6 × 722
k = 4332
As given
when the resistance is 768 ohms .
R = 768 ohms
K = 4332
Put in the formula .
I = 5.64 Ampere
Therefore the current is 5.64 Ampere when resistance is 768 ohms .
V=RI where V is the tension in volts;
You have that V=722×6=4332 Volts
Using this value for V you have that:
4332=768×I
So I=5.64 A
Answers
Choice 2- The difference between 2 and -1 is -3.
Part B
Martha's total score is -2
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Now simplify to 44=.22n
Divide 44 by .22 and theres your answer
N=... Well, ill let you figure that on your own
Answers
Answer:
AD/AB = AB/AC
Step-by-step explanation:
If we take two triangules in that figure: ABC and ABD, both are triangles rectangles. We need to use the definition of cosine, with the angle in th A corner, we called ∅.
For the ABC triangle: cos(∅) = adjacent cathetus/hypotenuse = AD/AB
For the ABD triangle: cos(∅) = adjacent cathetus/hypotenuse = AB/AC
Then:
cos(∅) = AD/AB = AB/AC
Answers
Answer:
The average was 259.24 in 1996.
Step-by-step explanation:
In order to find the year that the average, "y", is 259.24 we need to apply this value on the given expression, as done below:
The average was 259.24 after 26 years, therefore it was in 1996.