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iVinArrow [24]
3 years ago
6

Find exact value of sin 7pi/4

Mathematics
2 answers:
svetoff [14.1K]3 years ago
8 0
Is there a photo of a triangle ?
ehidna [41]3 years ago
3 0
sin( \frac{7 \pi }{4} )= -0.7071067812
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?.?.?.?.??.?..?.?.???..?..?
Mice21 [21]

Answer:

82

Step-by-step explanation:

Sides AB and BC are equal, which means angle BAC and BCA have the same measure, as stated in the base angles theorem. Angle BAC is 49 degrees, so angle BCA must also be 49 degrees. The sum of all angles in a triangle is 180 degrees, so angles BAC, BCA, and CBA will add up to 180. Write this in an equation:

BAC+BCA+CBA=180

BAC and BCA both measure 49 degrees:

49+49+CBA=180

Solve for CBA

CBA=180-49-49

CBA=82

lmk if i made any errors, hope this helps :)

6 0
2 years ago
The average of four numbers is 98. If three of the numbers are 86,87,and 91 what is the fourth number?
timurjin [86]
To find the average, you have to add all the numbers up and then divide by the amount of numbers you added together.

Equation: (86+87+91+x)/4=98
Solve for x:
86+87+91+x=98*4
264+x=392
x=392-264
x=128

The fourth number is 128
7 0
3 years ago
hello i really need help with this problem ive been stuck on it for 20 minutes so far i am willing to give 20 points if someone
Rasek [7]

Answer:

-9/20 with the given information i believe this is the answer

5 0
2 years ago
Combine like terms to create an equivalent expression.
zvonat [6]

Answer:

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Step-by-step explanation:

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3 years ago
What is a reasonable estimate of the capacity of a cereal bowl
iren2701 [21]
Oh, you're from connexus right? Well the answer is ounces
8 0
2 years ago
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