MTALHAHASSAN2
  • MTALHAHASSAN2
Can someone explain a math question?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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MTALHAHASSAN2
  • MTALHAHASSAN2
MTALHAHASSAN2
  • MTALHAHASSAN2
Can someone explain how they are getting Sin 75?
MTALHAHASSAN2
  • MTALHAHASSAN2
@Astrophysics

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Astrophysics
  • Astrophysics
Looks they used the law of sines
MTALHAHASSAN2
  • MTALHAHASSAN2
can you please explain that to me
Astrophysics
  • Astrophysics
I would be willing to go through it, but I'm a bit busy right now, if you still need help after I can go through it with you.
MTALHAHASSAN2
  • MTALHAHASSAN2
@Astrophysics i have a test tomorrow
MTALHAHASSAN2
  • MTALHAHASSAN2
just explain the sin 75 part
mathmale
  • mathmale
45+30=75, right?
MTALHAHASSAN2
  • MTALHAHASSAN2
yes
mathmale
  • mathmale
We've broken up 75 degrees into two composite parts. The reason for using 45 and 30 degrees is that both have easily memorized sine and cosine values.
mathmale
  • mathmale
The sum formula for the sine function (that is, the formula for the sum of two angles x and y) is sin (x+y) = sin x cos y + cos x sin y.
mathmale
  • mathmale
Plugging in the appropriate x and y values and simplifying should give you the sine of 75 degrees.
mathmale
  • mathmale
Hints: sin 45 = 1/Sqrt(2) cos 45 = 1 / Sqrt(2) sin 30 = 1/2 Cos 30 = Sqrt(3) divided by 2
mathmale
  • mathmale
I need to get off the 'Net. Hope this math info is helpful to you.
MTALHAHASSAN2
  • MTALHAHASSAN2
@mathmale its help a lot and thnx aloy
mathmale
  • mathmale
I'm very glad that our discussion has helped you.

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