Paano mo pinasimple (1 - sin ^ 2 theta) / (csc ^ 2 theta -1)?

Paano mo pinasimple (1 - sin ^ 2 theta) / (csc ^ 2 theta -1)?
Anonim

Sagot:

# sin ^ 2theta #

Maliban kung kailan #theta = pi / 2 + npi, n sa ZZ # (Tingnan ang paliwanag ni Zor)

Paliwanag:

Hinahayaan muna naming tingnan nang hiwalay ang numerator at denominador.

# 1-sin ^ 2theta = cos ^ 2theta #

# csc ^ 2theta = 1 / (sin ^ 2theta) #

# 1 / (sin ^ 2theta) - 1 = (1-sin ^ 2theta) / (sin ^ 2theta) = (cos ^ 2theta) / (sin ^ 2theta) #

Kaya

# (1-sin ^ 2theta) / (csc ^ 2theta-1) = (cos ^ 2theta) / ((cos ^ 2theta) / (sin ^ 2theta)) = sin ^ 2theta #