dyannjw25
dyannjw25 dyannjw25
  • 09-12-2020
  • Mathematics
contestada

Im having difficulty with these problems. Can someone please help me out?
1) Solve 2cos x=1
2) Solve: tan x -2sin x tan x=0
3) Solve: cos (2x)= -3^(1/2)/2

Respuesta :

nayuta
nayuta nayuta
  • 09-12-2020

Answer:

x=60° or 300°

Step-by-step explanation:

2cosx=1

cosx=1/2

cosx=cos60°,cos(360-60)°

cosx=cos60,cos300

either,

cosx=cos60

x=60

or,

cosx=cos300

x=300

Answer Link

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