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

Otras preguntas

Solve the equations. Give an exact and a four-decimal-place approximation.log 2X=2.3

Some hot dogs come in packages of 8. Why wold a baker of hot dog buns package 7 hot dog buns to a package?

where dose Michael Foreman visit for inspiration for his work

Could someone help me solve the inequality? |x-18| > or = to 6

15. Which one of the following choices is the closest in size to one serving of meat? A. A coffee mug B. A baseball C. An open palm D. A deck of cards

Four consecutive multiples of 10 have a sum of 300. What is the least of these numbers? F.20 G.30 H.40 J.50 K.60

how were mayan cities organized

Why might political parties write platforms before presidential elections

Solve the equations. Give an exact and a four-decimal-place approximation.log 2X=2.3

according to the author, what were condition like in europe during the 800's