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Effectus [21]
4 years ago
8

30.54

Mathematics
1 answer:
leonid [27]4 years ago
5 0
<h3>Answer: Choice 2)  sin(B) = cos(90-B)</h3>

Explanation:

The rule is that

sin(A) = cos(B)

if and only if A+B = 90.

Solving for A gets A = 90-B

So we end up with

sin(90-B) = cos(B)

which is the same as

cos(B) = sin(90-B)

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mamaluj [8]

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i dont undrstand

Step-by-step explanation:

7 0
3 years ago
Simplify (2a/a^2)^-2
larisa86 [58]

Answer:4/a^2

Step-by-step explanation:

3 0
3 years ago
A researcher is interested in the effects of exercise on mental health and he proposes the following study: Use stratified rando
Andre45 [30]

Answer:

Step-by-step explanation:

(a) The type of study described in the question is referred to as an experimental study.

(b) The treatment group is the group that exercises 2 times a week, whereas the control group is the group that does not exercise.

(c) Yes, the study under consideration makes use of blocking.

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6 0
4 years ago
What is h(x)=x^(2)+2 find x if h(x)=6 please help me
zysi [14]

Answer:

its both positive or negative 2

Step-by-step explanation:

Y=x^(2)+2

*subtract the 2 on both sides: 6=x^(2)+2

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the square root of 4 is 2, so the answer would be positive 2.

we also know -2^2 is positive 4, which gives us

x=+2

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6 0
3 years ago
What is the inverse of the following conditional: if n is the sum of two even numbers then n is even?
Effectus [21]
In my view the right inverse looks like this: <span>if n is NOT the sum of two even numbers then n is NOT even</span>
3 0
3 years ago
Read 2 more answers
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