MapleBacon MapleBacon
  • 09-12-2017
  • Mathematics
contestada

Find the exact value of the expression
cos10°cos20°-sin10°sin20°
Please Help

Respuesta :

zizoux07p0ac3m
zizoux07p0ac3m zizoux07p0ac3m
  • 09-12-2017
cos10 cos20 -sin10 sin20 = cos(10+20) = cos30 = √3/2
Answer Link

Otras preguntas

What is the keyboard shortcut Ctrl+Z used for?
find ,each difference and simply if possible 9 2/6 - 6 5/6
Gina was baking cookies.A dozen cookies requires 1/6 of a cup of chocolate chips.She wants to use 1/2 of a cup.How many dozen cookies can she make?
Why doesn't gravity pull water all the way to the center of the Earth?
Which word in the sentence is the indirect object? The spelling bee committee sent my brother a registration form. A. committee B. my C. brother D. form
Which of the following correctly describes seafloor spreading? A. New oceanic crust is formed at midocean ridges, pushed away from the ridge, and destroyed at d
The profit a company earns every month depends of the amount of product sold, p, for $855 each and the amount spent in rent, utilities and other expenses, which
The Nile River runs through what countries?
Where do anaerobic bacteria live?
20 is 12.5$ of what number?