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konstantin123 [22]
3 years ago
7

Explain why (cos((theta))? + (sin((theta))2 = 1

Mathematics
1 answer:
frez [133]3 years ago
5 0

Imagine a right triangle where a and b are the legs and c is the hypothenuse.

Pitagora: a²+b²=c²

Divide by c

(a/c)²+(b/c)²=1

But a/c=sin(B) and b/c=cos(B)

Thus sin² + cos² = 1

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Alisiya [41]
X is 20 because 20/5 is 4 n 4+1=5
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One hat and Two shirts costs $21. Two hats and one shirt $18. Megan has exactly enough money to buy one hat and one shirt. How m
xxTIMURxx [149]

Suppose Megan has enough money to buy 1 hat and 2 shirts for $21 and then another 2 hats and 1 shirt for $18.  In total, she has bought 3 hats and 3 shirts for $39.  But she has enough for only 1 hat and 1 shirt and so Megan has 39 ÷ 3 = $13.

8 0
3 years ago
How much lighter is 345 g than 1,1 kg​
NemiM [27]

Answer:

755 gram lighter

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3 0
3 years ago
Eight subtracted from the product of 5 and a number is 57 need the equation
mrs_skeptik [129]
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5 0
3 years ago
Please help me!!!!!!
Elodia [21]

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t=5.25x

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(putting a variable next to a number means your multiplying it)

I hope I explained that clearly enough :P

8 0
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