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konstantin123 [22]
2 years ago
7

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

Mathematics
1 answer:
frez [133]2 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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3 years ago
7. The points P(2, -3), Q(3, -2) and R(8, z) are
Hatshy [7]

Answer:

z = 3

Step-by-step explanation:

Since the points are collinear then the slopes between the points are equal.

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m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

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4 0
2 years ago
Lizbeth deposited $6200 into a savings account for which interest is compounded monthly at a rate of 2.37%. How much interest wi
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A=6200(1+0.0237/12)^12*8
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Step-by-step explanation:

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