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galben [10]
3 years ago
8

Simplify the following expression:

Mathematics
1 answer:
nalin [4]3 years ago
3 0
-2/2 I think probably
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Can someone please help me on this question
gregori [183]

Answer: It's C.

Step-by-step explanation:

3 0
2 years ago
How cos π/3=1/2?<br>having some problems learning continuity.
Bingel [31]

You can show that \cos\frac\pi3=\frac12 by constructing a triangle.

Take two points, O(0, 0) and A(1, 0), and let B be the point on the unit circle such that the angle between the line segments OA and OB is \frac\pi3 radians.

Since both A and B lie on the circle, the line segments OA and OB both have length 1 (same as the circle's radius). We finish constructing the triangle by connect A and B.

Since OB and OA have the same length, triangle OAB is isosceles, but more than that, it's also equilateral. Why? Because the interior angles of any triangle always add to \pi radians. We know one of the angles is \frac\pi3 radians, which leaves a contribution of \frac{2\pi}3 radians between the remaining angles A and B. Angles A and B must be congruent (because OAB is isosceles), which means they also have measure \frac\pi3 radians.

Next, draw an altitude of the triangle through point B, and label the point where it meets the "base" OA, C. Since OAB is equilateral, the altitude BC is also a perpendicular bisector. That means OC has length \frac12, and by definition of \cos we have

\cos\dfrac\pi3=\dfrac{OC}{OB}=\dfrac{\frac12}1=\dfrac12

3 0
3 years ago
Select the correct operator for the following exponential expression. 0.510 ? 52
kupik [55]
A decimal is less than a whole number. 

So,

0.510<52

"B" is the answer.

I hope this helps!
~kaikers
7 0
3 years ago
25/28=375/x. Use equivalent ratios to solve the proportion.
ANEK [815]
X=420. You can find this by cross multiplying.
4 0
3 years ago
Tamara has decided to start saving for spending money for her first year of college. Her money is currently in a large suitcase
spayn [35]

Answer:

Add both of the function together.

Step-by-step explanation:

s(x) + a(x) = 450 + 6(x - 2)

4 0
3 years ago
Read 2 more answers
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