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borishaifa [10]
3 years ago
8

What is the degree measure of the smaller angle between the hour hand and the minute hand of a clock at exactly 2:30 p.m. on a 1

2-hour analog clock?
Mathematics
2 answers:
SVEN [57.7K]3 years ago
5 0

Answer:

105°

Step-by-step explanation:

We are supposed to find the angle between the hour hand and the minute hand at a time of 2:30 in a 12 hour analog clock.

So, we have 12 segments in a clock , each segment corresponding to an hour.

Angle of each segment would be :-

\frac{360}{12} =30

At 2:30 the minute hand will be facing 6 hour direction and the hour hand between hours 2 and 3.

So the angle between them would be

3*30+15=105

So the angle between the hour and the minute hand at time 2:30 is 105°.

PilotLPTM [1.2K]3 years ago
4 0

Answer:

105 Degrees

Step-by-step explanation:

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If sinA=√3-1/2√2,then prove that cos2A=√3/2 prove that
Ivan

Answer:

\boxed{\sf cos2A =\dfrac{\sqrt3}{2}}

Step-by-step explanation:

Here we are given that the value of sinA is √3-1/2√2 , and we need to prove that the value of cos2A is √3/2 .

<u>Given</u><u> </u><u>:</u><u>-</u>

• \sf\implies sinA =\dfrac{\sqrt3-1}{2\sqrt2}

<u>To</u><u> </u><u>Prove</u><u> </u><u>:</u><u>-</u><u> </u>

•\sf\implies cos2A =\dfrac{\sqrt3}{2}

<u>Proof </u><u>:</u><u>-</u><u> </u>

We know that ,

\sf\implies cos2A = 1 - 2sin^2A

Therefore , here substituting the value of sinA , we have ,

\sf\implies cos2A = 1 - 2\bigg( \dfrac{\sqrt3-1}{2\sqrt2}\bigg)^2

Simplify the whole square ,

\sf\implies cos2A = 1 -2\times \dfrac{ 3 +1-2\sqrt3}{8}

Add the numbers in numerator ,

\sf\implies cos2A =  1-2\times \dfrac{4-2\sqrt3}{8}

Multiply it by 2 ,

\sf\implies cos2A = 1 - \dfrac{ 4-2\sqrt3}{4}

Take out 2 common from the numerator ,

\sf\implies cos2A = 1-\dfrac{2(2-\sqrt3)}{4}

Simplify ,

\sf\implies cos2A =  1 -\dfrac{ 2-\sqrt3}{2}

Subtract the numbers ,

\sf\implies cos2A = \dfrac{ 2-2+\sqrt3}{2}

Simplify,

\sf\implies \boxed{\pink{\sf cos2A =\dfrac{\sqrt3}{2}} }

Hence Proved !

8 0
3 years ago
What is 20x12? please help! thankss!!
Vanyuwa [196]
240 is the correct answer. 
6 0
3 years ago
Read 2 more answers
What is the slope intercept form of this table?
katrin [286]

Answer:

C. y = 600x + 2200

Step-by-step explanation:

2800-2200 = 600 = slope

2200 (y value) has the x value 0, so 2200 is the y-inercept

hope this helps :)

4 0
3 years ago
During a 3-hour storm, it snow 2.5 inches. Jacob said that it snowed an average of about 8 inches per hour. What is the error?
Ad libitum [116K]
The error was the Jacob multiplied 2.5 by 3 instead of dividing. Instead it should be. 2.5 / 3 \\ &#10;.83 inches an hour
3 0
3 years ago
A rectangle is 5 times as longer than it is wide. Its width is three-sixteenths of its perimeter. Find its perimeter.
VikaD [51]
Length = 5x
width = x
area = 125
A = L*W
125 = (5x)(x)
125 = 5x^2
125/5 = x^2
25 = x^2
sqrt{25} = sqrt{x^2}
5 = x
The width is 5 feet.
The length is 5 times 5 feet or 25 feet.
To find the perimeter, we use P = 2L + 2W.
P = 2(25) + 2(5)
P = 50 + 10
P = 60 feet.
Done!
4 0
3 years ago
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