The expression is:
cos (π / 5) cos (π/7) + sin (π/5) sin(π/7)
This expression can be reduced into a trigonometric function with one angle if we make use of the trigonometric identities. The appropriate identity is:
cos (A - B) = cos A cos B + sin A sin B
If we let
A = π / 5
B = π / 7
Therefore,
cos (π / 5) cos (π/7) + sin (π/5) sin(π/7) = cos (π/5 - π/7) = cos (2π/35)
The length of the base of the parallelogram that has a height of 5 yards and an area of 150 square yards is 30 yards
<h3>How to determine the base length?</h3>
The given parameters are:
Area = 150
Height = 5
The area of a parallelogram is:
Area = Base * Height
So, we have:
Base * 5 = 150
Divide both sides by 5
Base = 30
Hence, the length of the base of the parallelogram is 30 yards
Read more about areas at:
brainly.com/question/24487155
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Answer:
616 cm²
Step-by-step explanation:
To find the area of a circle you use the formula A = π · r²
So we know that the diameter is 28 cm, to find the radius we would divide this in half, because d = 2r, giving us 14. Now we can do 14² which is 196, and then times that by pi or in this case 22/7.
196 × (22/7) = 616
Answer:
$9/hr
Step-by-step explanation:
Find how much she earned by dividing 234 by 26:
234/26
= 9
So, Jannat made $9 per hour.