MATHEMATICS HIGH SCHOOL

Which double-angle or half-angle identity would you use to verify that sin2x/2sin^2x=cotx

Answers

Answer 1

Answer:

Answer:

Double-angle or half-angle identity used is

sin2x= 2 sinx cosx

Step-by-step explanation:

We have to find $(sin2x)/(2sin^2x)$

sin2x= 2 sinx cosx

Substituting

$(sin2x)/(2sin^2x)=(2sinxcosx)/(2sin^2x)=(cosx)/(sinx)=cotx$

Double-angle or half-angle identity used is

sin2x= 2 sinx cosx

Answer 2

Answer:

Answer:

[D] sin 2x = 2 sin x cos x

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Answers

$Use:a^2-b^2=(a-b)(a+b)\n\nt^4-16=(t^2)^2-4^2=(t^2-4)(t^2+4)=(t^2-2^2)(t^2+4)=(t-2)(t+2)(t^2+4)$

By what factor is Triangle 1 reduced to form Triangle 2?

Answers

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The required scale factor is :

$0.75$

I need help please as fast as possible

Answers

Answer:

yo answer is bottom left

cause the y intercept is touching 2 and 1/2

Step-by-step explanation:

Answer: C I believe.

Step-by-step explanation:

The Y-intercept would be on the Y axis(up and down) and the slope being 1/2, you would go right one and up two(opposite when negative).

Find the measure of YZ if Y is the midpoint of XZ.A. 2
B. 10
C. 16
D. 20
Thank you!!!!

Answers

B. 10
Because Y is the midpoint of XZ, XY=YZ, solve for x, then plug in that number that x equals for YZ

There are eight marbles in a bag. Four marbles are blue (B), two marbles are red (R) and two marbles are green (G) Steve takes a marble at random from the bag. What is the probability that Steve will take a blue marble.

Answers

Answer:

1/2 or 50%

Step-by-step explanation:

Blue= 4, Red= 2, Green= 2

Total marbles= 8

P(B)= 4/8= 1/2 or 50%

Answer:

1/2

Step-by-step explanation:

There are 8 marbles in total and 4 are blue, so 4/8 are blue. Then simplify 4/8 and you will get 1/2.

The Venus flytrap closes in 0.3 second and the waterwheel plant closes in 0.2 second what decimal in halfway between 0.2 and 0.3 ?

Answers

In order to find the number in between two numbers you need to calculate their mean. This can be done by adding them up then dividing by 2. In this case, 0.2+0.3 = 0.5. You can then divide this by 2 to give 0.25
Thus the decimal in between 0.2 and 0.3 is 0.25.

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