Abby818
Abby818
08-11-2016
Mathematics
contestada
(1+sin y)(1+sin (-y))= cos^2y
Respuesta :
Аноним
Аноним
08-11-2016
Sin (-y)=-sin y
sin²y+cos²y=1 ⇒ cos²y=1-sin²y
Therefore:
(1+sin y)(1+sin(-y))=cos²y
(1+sin y)(1-sin y)=cos²y
1-sin²y=cos ²y
cos²y=cos²y
Answer: it is true this identity .
Answer Link
VER TODAS LAS RESPUESTAS ( 19+ )
Otras preguntas
former name of the Manhattan area
Baldwin believes that he has been influenced by all of the following sources except — a. Charles Dickens c. African American speech patterns b. the King James B
From $80 to $64 I dont know what the percent is?
what is the equation to speed
five cakes cost 4.00 how much do 7 cost
How would becoming a parent now affect your goals for the future
The school student council sponsored a Switch Day where students were able to switch classes every 20 minutes. The students are in school for 7 hours. If a stud
Which document said that all settlers in Jamestown had the same rights as the people in England? A. Richmond Dispatch B. Virginia Charter C. Mayflower Compa
Melody used the table at the right to find the number of people served with 15 pounds of ground turkey. Find her error and correct it
Who founded Georgia as a safe place for debtors? A. William Penn B. Cecil Calvert C. Thomas Hookker D. James Oglethorpe
