myrk
myrk
10-05-2017
Mathematics
contestada
What is the exact value of sin -840
Respuesta :
Аноним
Аноним
10-05-2017
first subtract 2 revolutions from the - 840 :- (- (840-720) = -120
This gives sin -120 which is in the 3rd quadrant of the unit circle
sin -120 = - sin 60 = - sqrt3/2
Answer Link
VER TODAS LAS RESPUESTAS ( 28+ )
Otras preguntas
A particular circle in the standard (x,y) coordinate plane has an equation of (x − 5)^2 + y^2 = 38. What are the radius of the circle, in coordinate units, and
How do I solve this if there are only 2 numbers
An industrial cleaner is manufactured using only the 3 secret ingredients A, B, and C, which are mixed in the ratio of 2:3:5, respectively, by weight. How many
Ms. Hernandez began her math class by saying: I'm thinking of 5 numbers such that their mean is equal to their median. If 4 of the numbers are 14, 8, 16, and 14
3 is 0.2 percent of what number?
How do I solve b^2-5b-24=0
The length of a rectangle is 3 times the length of a smaller rectangle. The 2 rectangles have the same width. The area of the smaller rectangle is A square unit
If x and y are real numbers such that x > 1 and y < −1, then which of the following inequalities must be true? A. x/y> 1 B. |s|^2 > |y| C. x/3− 5 &g
Hot to do 18/32 show your work
A rectangle has an area of 32 square feet and a perimeter of 24 feet. What is the shortest of the side lengths, in feet, of the rectangle? F. 1 G. 2 H. 3 J. 4
