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Setler [38]
2 years ago
11

In Diagram 6, JCK is a tangent to the circle ABC

Mathematics
1 answer:
Igoryamba2 years ago
5 0

Answer:

C

Step-by-step explanation:

if you don't know it choose C

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Does this graph below represent a function? (Yes or no)
Whitepunk [10]

Answer:yes

Step-by-step explanation: it represents a function

4 0
2 years ago
Use prime factorization to reduce the fraction 36/180
laila [671]

Answer:

Step-by-step explanation:

36 = 6* 6 = 2* 3 * 2* 3 = 2*2*3*3

180 = 2 * 2 * 3 * 3 * 5 = 2 * 2 * 3*3*5

\frac{36}{180}= \frac{2*2*3*3}{2*2*3*3*5} =  \frac{1}{5}

Factors that are common will be cancelled

5 0
2 years ago
1. It costs $3.45 to buy 3/4 lb of chopped walnuts. How much would it cost to purchase
konstantin123 [22]

Answer:

$34.50

Step-by-step explanation:

First, how many 3/4 lbs are in 7.5 lbs?

7.5 lbs = 15/2 lbs.

(15/2) / (3/4) = 10

There are 10 "3/4" lbs in 7.5 lbs.

So, if it costs $3.45 to purchase 3/4 lbs of chopped walnuts, it would cost $3.45 times 10 dollars to purchase 7.5 lbs of chopped walnuts, or $34.50.

Let me know if this helps!

5 0
2 years ago
The sum of two number is 10. the difference between the numbers is 4. what are the two numbers.
dolphi86 [110]
Your answer is 7 and 3.
3 0
3 years ago
Prove by mathematical induction that
postnew [5]

For n=1, on the left we have \cos\theta, and on the right,

\dfrac{\sin2\theta}{2\sin\theta}=\dfrac{2\sin\theta\cos\theta}{2\sin\theta}=\cos\theta

(where we use the double angle identity: \sin2\theta=2\sin\theta\cos\theta)

Suppose the relation holds for n=k:

\displaystyle\sum_{n=1}^k\cos(2n-1)\theta=\dfrac{\sin2k\theta}{2\sin\theta}

Then for n=k+1, the left side is

\displaystyle\sum_{n=1}^{k+1}\cos(2n-1)\theta=\sum_{n=1}^k\cos(2n-1)\theta+\cos(2k+1)\theta=\dfrac{\sin2k\theta}{2\sin\theta}+\cos(2k+1)\theta

So we want to show that

\dfrac{\sin2k\theta}{2\sin\theta}+\cos(2k+1)\theta=\dfrac{\sin(2k+2)\theta}{2\sin\theta}

On the left side, we can combine the fractions:

\dfrac{\sin2k\theta+2\sin\theta\cos(2k+1)\theta}{2\sin\theta}

Recall that

\cos(x+y)=\cos x\cos y-\sin x\sin y

so that we can write

\dfrac{\sin2k\theta+2\sin\theta(\cos2k\theta\cos\theta-\sin2k\theta\sin\theta)}{2\sin\theta}

=\dfrac{\sin2k\theta+\sin2\theta\cos2k\theta-2\sin2k\theta\sin^2\theta}{2\sin\theta}

=\dfrac{\sin2k\theta(1-2\sin^2\theta)+\sin2\theta\cos2k\theta}{2\sin\theta}

=\dfrac{\sin2k\theta\cos2\theta+\sin2\theta\cos2k\theta}{2\sin\theta}

(another double angle identity: \cos2\theta=\cos^2\theta-\sin^2\theta=1-2\sin^2\theta)

Then recall that

\sin(x+y)=\sin x\cos y+\sin y\cos x

which lets us consolidate the numerator to get what we wanted:

=\dfrac{\sin(2k+2)\theta}{2\sin\theta}

and the identity is established.

8 0
2 years ago
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