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 ( 63+ )
Otras preguntas
Round 4.89 to the nearest tenth
general Taylor defeated this Mexican commander at buena vista
Lincoln’s Second Inaugural Address (1865) *What are the two themes in Lincoln’s speech? *How does Lincoln develop the ideas of the text and use them to build hi
In the figure , a || b and m 1=34 degrees What's m 5 _____ degrees
Which sentence is written correctly? A. Luke's house is more farther from the swimming pool than ours is. B. Kyle's handwriting was the most neatest of any stud
Alan can chop 3/4 of a carrot in 1/8 min. How many carrots can he chop in 1 min? (I want to see how fast Brainly is)
how do you solve the problem log8-2log6+log3
What was the name of the newspaper that William Lloyd Garrison published in order to spread his anti-slavery ideas? The Democratic Review The Pennsylvania Gazet
the difference between the water levels for high and low tide was 3.6 write and solve an equation to find the water level at high tide
Charmaine's penny bank is 1/3 full. After she adds 80 pennies, it is 1/2 full. How many pennies can Charmaine's bank hold?
good job
