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Studentka2010 [4]
3 years ago
15

If sin150=1/2 then find sin75

Mathematics
1 answer:
Darya [45]3 years ago
3 0

Sin75° = Sin(30° + 45°)

= Sin30°.Cos45° + Sin45°.Cos30°

= 1/2 . √2/2 + √2/2.√3/2

= √2/2 ( 1/2 + √3/2 )

= √2/2 ((1+√3 ) /2 )

= (√2 + √6 )/ 4

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Help! I’ll reward brainest its pretty easy<br> (Btw it’s the third person to the bus not the first)
just olya [345]

Answer:

Preston 48.20 seconds.

Step-by-step explanation:

Look at the times for all 4 of them.

  • Sarah 48.02 seconds.
  • Preston 48.20 seconds.
  • Josh 52 seconds.
  • Amber 40.02 seconds.

From the information given, we can find the first to the last person to the bus. Whoever came to the bus in less seconds is the first person to reach to the bus and whoever came to the bus in more seconds is the last person to reach to the bus.

1 ---> Amber 40.02 seconds.

2 ---> Sarah 48.02 seconds.

3 ---> Preston 48.20 seconds.

4 ---> Josh 52 seconds.

I hope this helps and stay safe, happy, and healthy. Also I would appreciate if you give me the brainlist or not, thank you :) !!

3 0
3 years ago
Three straight lines are shown in the diagram.<br> 310°<br> a<br> C<br> 38%<br> 87%
NeX [460]

Answer:

a is 50

b is 100

and c is 130

Step-by-step explanation:

1) the reason why a is 50 because a circle has a constant angle which is 360 so we just need to subtract 360 by 310 to find out the missing angle to complete the entire circle.

2) a straight angle has a constant angle which is 180 degrees and now we have the given angle 80 so to complete the straight angle we just need to subtract 180 to 80.

3) now as we've found a, which is 50 degrees, we now also know that a straight angle is 180 degrees so just subtract 180 by 50 so we get 130.

I'm sorry I'm really bad at explanations but I tried and I hope it helps.

thank you

3 0
3 years ago
Read 2 more answers
What is 805/37x23-90+20
Ulleksa [173]
15925/37
Is the answer to your question
5 0
4 years ago
16. Find the perimeter and area of a rectangle with length 6ft. and width 4 ft.
Andreas93 [3]
P = (L+W)*2
⇒ P= (6+4)*2
⇒ P= 10*2
⇒ P= 20.

S= L*W
⇒ S= 6*4
⇒ S= 24

The perimeter and area of the rectangle is 20 ft and 24 ft^2 respectively~
6 0
4 years ago
Malachai is doing a 20 miles bike ride. He has cycled 11 miles so far. What percentage of the the total distance has he cycled
Anestetic [448]
11 miles / 20 miles =.55
.55 x 100 = 55%
11/20 is the proportion and you multiply by 100 to gey a percent
another way to solve is
11/20 x 5/5 = 55/100 = 55%
you multiply by 5/5 because it is equal to one and it makes the denominator equal to 100 it also follows the rule that whatever you do to the top you must do with the bottom
5 0
3 years ago
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