jak7ha2Girlbellacno jak7ha2Girlbellacno

19-08-2016
Mathematics

contestada

in ∆abc, what is the value of cos b?

Respuesta :

dalendrk dalendrk

21-08-2016

[tex]c^2=a^2+b^2-2ab\cos\beta\\\\2ab\cos\beta=a^2+b^2-c^2\\\\\boxed{\cos\beta=\dfrac{a^2+b^2-c^2}{2ab}}[/tex]

Answer Link

Otras preguntas

What might happen to those who talked badly about the government?

Can someone help me please in thank you

what is the geometric sequence of -13,117,-1053

1. A list of numbers is shown below. 4/3,-0.09,1.3,85%,-3/8 which list shows the numbers in ascending order? A. -3/8,0.09,85%,.1.3,4/3 B-009,-3/8,85%,1.3,4/3 c.

i need help ASAP !!

I NEED THIS ASAP- Point A is located at (-5, -8). Point A is reflected across the X-axis to create point B. What is point B?

Unequal heating of air over land and water results in breezes near shorelines. While the land is warm during the day, air above it rises, and a cool breeze blow

you flip a coin 10 times in a row. every single time it comes up heads. on the 11th flip, is it more likely to be heads, tails, or are heads and tails equally l

The author of Fish Cheeks shows the awkwardness of adolescence as the narrator's family and social life collide. How does the author convey the issue of how Amy

At some point in their recent history, all of the following countries became divided into two political entities as a result of cultural or ideological conflict