caycay17
caycay17
25-06-2018
Mathematics
contestada
Help Please regarding the law of cos.
Respuesta :
mkryukova19
mkryukova19
25-06-2018
a=4,
b=3,
c= 2
a² + b² -2abcosC =c²
a² + b² - c² = 2abcosC
2abcosC
= 4² + 3² -2² = 16 + 9-4=
21
Answer :
B.21
Answer Link
Аноним
Аноним
25-06-2018
The equation can be solved for 2abcosC
a²+b²-c² = 2abcosC
4²+3²-2² = 2abcosC
16 + 9 - 4 = 2abcosC
25 - 4 = 2abcosC
21 = 2abcosc
Answer Link
VER TODAS LAS RESPUESTAS ( 18+ )
Otras preguntas
subtract by first simplifying each radical and the combining any like radicals. 5√162 − 3√18 − 4√98 (a) 11√2 (b) 8√2 (c) −11√2 (d) 5√2
A fish tank at a pet store has 8 zebra fish. In how many different ways can Nikki choose 3 zebra fish to buy? A.56 B. 336 C. 24 D.512
Which of the following secondary sources are appropriate to use for research? A. scholarly sources B. substantive news C. popular magazines
How many electrons do hydrogeyn have?
Which of the following statements is true? A. Biotic factors are nonliving components of an ecosystem. B. Abiotic factors are living components of an ecosys
Match the Cold War event with its year(s) 1.Vietnam War 2.Afghanistan War 3.Korean War 4.Sputnik I Launched 5.Fall of the Berlin Wall 6.Cuban Missile Cris
Lyra and Donna are testing the two-way radios they built for their high school science project. Lyra goes to the top of a building that is 22 meters high with o
Six equilateral triangles are connected to create a regular hexagon. The area of the hexagon is 24a^2 – 18 square units. Which is an equivalent expression for t
What is 7.8 × 105 m/h in kilometers per day? A. 3.24 × 1010 km/day B. 3.24 × 108 km/day C. 1.872 × 106 km/day D. 1.872 × 104 km/day
valence is the number of electrons an atom must gain or lose in order to _____ its outer shell or have a stable octet in its outer shell.
