lowehan002 lowehan002
  • 26-04-2021
  • Mathematics
contestada


If cos A= -4/5 and A is in the second quadrant, then cos 2A = ?

Respuesta :

briarhoff55 briarhoff55
  • 27-04-2021

Answer:

i think its second pythagreom therom

Step-by-step explanation:

because

Answer Link

Otras preguntas

Determine the standard form of the equation of the line that passes through (-7,8) and (0,2) A. -6x - 7y = 14 B. 6x + 7y = 14 C. 7x - 6y = -14 D. -6x + 7y = -14
Can someone help?Thanks:)
Balance the equation Mg+Fe2O3->MgO+Fr
Nico won $70 in a drawing contest. He spent 3/8 of the winnings buying more art supplies. How much money does he have left? Plz show work and explain your answe
Which does not affect the rate of pulmonary and systemic gas exchange? a. partial pressure of the gases. b. surface area available for gas exchange. c. diffusio
can anybody help me on this
gina wants to add another resistor to this circuit. She wants to ensure that after the new resistor is added, it will all work independently of the resistor tha
(2y+3)(3y^2+4y+5) use the chart to multiply the binomial by the trinomial
Help, help, help me please.
Arteries branching away from the heart become ______. larger and larger or smaller and smaller