samoka
samoka
02-04-2017
Mathematics
contestada
Does anyone can help me to prove that ...
Respuesta :
ghanami
ghanami
02-04-2017
hello :
by identity : cos²(x)+sin²(x) = 1
divide by cos²(x) :
cos²(x) /cos²(x) +sin²(x)cos²(x)/ = 1/cos²(x)
1+sin²(x)cos²(x)/ = 1/cos²(x)
1+ (sin(x)/cos(x))² = 1/cos²(x)
1+tan²(x) = 1/cos²(x)
conclusion :
tan²(x) = 1/cos²(x) -1
Answer Link
VER TODAS LAS RESPUESTAS ( 61+ )
Otras preguntas
please help :(( find the perimeter of this figure 25yd, 25yd, 40yd image attached
How might our economy look if regulations like price floors and ceilings were introduced into every industry?
Formal letter to the editor complaining about the youth of today doesn’t have manners
Read the excerpt from "Sympathy" by Paul Laurence Dunbar. Then, answer the question that follows. And they pulse again with a keener sting— I know why he beats
What kingdom was the glory age of ancient Egypt?
8a + 16c. What is the value of the expression when a = –5 and c = –1? Enter your answer in the box.
Interest and Annuity 7. A sum of money doubles itself in 6 years at certain rate of interest. In how many years would it triple if the rate of interest is incre
Complete the sentence. Badgers have huge foreclaws, with larger animals such as coyotes. powerful legs and sometimes hunt cooperatively have powerful legs
What is the most commonly followed religion in Israel?
Which statement from the article best expresses the author’s claim about chess
