Hvordan verificerer du (tan ^ 2x) / (secx-1) -1 = secx?

Hvordan verificerer du (tan ^ 2x) / (secx-1) -1 = secx?
Anonim

# "Venstre side" = tan ^ 2x / (secx-1) -1 #

Brug identiteten: # Cos ^ 2x + sin ^ 2x = 1 #

# => 1 + tan ^ 2x = sec ^ 2x #

# => Tan ^ 2x = sec ^ 2x-1 #

# => "Venstre side" = (sec ^ 2x-1) / (secx-1) -1 = (annuller (secx-1)) (sekx + 1)) / annuller (secx-1) -1 #

# => secx + 1-1 = farve (blå) secx = "højre hånd side" #