3 years ago

What happens to the Law of Cosines if the known angle is 90 degrees?

Mathematics

1 answer:

poizon [28]3 years ago

8 0

Answer:

See below.

Step-by-step explanation:

It transforms to the Pythagoras theorem.

c^2 = a^2 + b^2 - 2ab cos C

If C = 90, cos C = zero so the last term disappears.

c^2 = a^2 + b^2 - 2ab * 0

c^2 = a^2 + b^2.

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The answer to the question below is 8/15 right?

ioda

When you have something like this, to simplify the exponent you multiply them together, so the exponent is 1/3 x 1/5.
1/3 x 1/5 is 1/15, so the simplified expression is:
$m^{ \frac{1}{15} }$
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3 years ago

Read 2 more answers

For f(x)=2x+1 and g(x)=x^2-7, find (f+g)(x) A. 2x^2-15 B.X^2+2x-6 C.2x^3-6 D.x^2+2x+8

Advocard [28]

Answer:

Step-by-step explanation:

(f + g)(x) = f(x) + g(x) , thus

f(x) + g(x)

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3 years ago

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Semmy [17]

Answer:

Step-by-step explanation:

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2 years ago

Jason receives some money for his birthday. He spends 15 of the money and has $14.40 left. Calculate how much money he received

Tasya [4]

He had $14.40 + $15 =39.40

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3 years ago

Roundup Racquets restrings tennis racquets for $22. If the store restrings 20 racquets each month, what is the monthly revenue f

ser-zykov [4K]

Answer:

The revenue would be $ 440

Step-by-step explanation:

Consider the correct complete question is,

"Roundup Rackets restrings a tennis racket for $22. If the store restrings 20 rackets each month, what is the monthly revenue from restringing rackets."

Thus,

The price for restrings each tennis racket = $ 22,

Number of rackets re stringed in a month = 20,

Hence, the monthly revenue = price of restrings each tennis racket × number of rackets re stringed

= 22 × 20

= $ 440

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3 years ago