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slamgirl [31]
3 years ago
15

Prove the following identi v 1-cos2A/sin2A=tanA

Mathematics
1 answer:
SVETLANKA909090 [29]3 years ago
8 0

Answer:

 1-cos2A/sin2A

=(1-cos^2 A+sin^2 A)/(2sinAcosA)

=(sin^2 A+sin^2A)/2sinAcosA

=2sin^2 A/2sinAcos^2 A

=sinA/cosA

=tanA

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A local grocery story has strawberries on sale for $1.45 per pound. How much would it cost to buy 5.5 pounds of strawberries? Ro
myrzilka [38]

Answer: The cost of 5.5 pounds strawberries =$ 7.98

Step-by-step explanation:

Given: A local grocery story has strawberries on sale for $1.45 per pound.

i.e. Cost for 1 pound strawberries = $1.45

Now, Cost of 5.5 pounds strawberries =  5.5 x (Cost for 1 pound strawberries)

= $ (5.5 x  1.45)

= $ 7.975 ≈ $ 7.98   [ Round to the nearest penny]

Hence, the cost of 5.5 pounds strawberries =$ 7.98

5 0
3 years ago
The net below has dimensions l = 14 feet, w = 7 feet, and h = 13 feet. How will the surface area of the figure change if the wid
Serjik [45]
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3 0
3 years ago
What does arc BC equal?
Dmitrij [34]

Answer:

124

Step-by-step explanation:

take 146, add 90 then subtract that answer from 360

8 0
3 years ago
Does anyone notice or know why is brainly dead for many days??​
ziro4ka [17]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
Bro i need this <br><br> (x − 5)^2 = x^2 − 25
forsale [732]

Answer:

x=5

Step-by-step explanation:

x^2+25-10x = x^2-25

-x^2               -x^2

25-10x = -25

-25        -25

-10x = -50

x=5

lets check

(5-5)^2 = 5^2-25

0^2 = 25-25

0 = 0

7 0
2 years ago
Read 2 more answers
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