Vereenvoudig de uitdrukking :? (Sin ^ 2 (pi / 2 + a) -cos ^ 2 (alfa-pi / 2)) / (tg ^ 2 (pi / 2 + a) -ctg ^ 2 (alfa-pi / 2))

Vereenvoudig de uitdrukking :? (Sin ^ 2 (pi / 2 + a) -cos ^ 2 (alfa-pi / 2)) / (tg ^ 2 (pi / 2 + a) -ctg ^ 2 (alfa-pi / 2))
Anonim

# (Sin ^ 2 (pi / 2 + a) -cos ^ 2 (alfa-pi / 2)) / (^ 2 tan (pi / 2 + a) -cot ^ 2 (alfa-pi / 2)) #

# = (Sin ^ 2 (pi / 2 + a) ^ 2 -cos (pi / 2-alfa)) / (^ 2 tan (pi / 2 + a) -cot ^ 2 (pi / 2-alfa)) #

# = (Cos ^ 2 (a) sin ^ 2 (a)) / (cot ^ 2 (a) -tan ^ 2 (a)) #

# = (Cos ^ 2 (a) sin ^ 2 (a)) / (cos ^ 2 (a) / sin ^ 2 (a) sin ^ 2 (a) / cos ^ 2 (a)) #

# = (Cos ^ 2 (a) sin ^ 2 (a)) / ((cos ^ 4 (a) -sin ^ 4 (a)) / (sin ^ 2 (a) cos ^ 2 (a))) #

# = (Cos ^ 2 (a) sin ^ 2 (a)) / (cos ^ 4 (a) -sin ^ 4 (a)) xx (sin ^ 2 (a) cos ^ 2 (a)) / 1 #

# = (Cos ^ 2 (a) sin ^ 2 (a)) / ((cos ^ 2 (a) sin ^ 2 (a)) (cos ^ 2 (a) + sin ^ 2 (a)) xx (sin ^ 2 (a) cos ^ 2 (a)) / 1 #

# = Sin ^ 2 (a) cos ^ 2 (a) #