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 ( 43+ )
Otras preguntas
Rajesh is working out the area of a circle with radius 10. he writes: area = 3.142 x 20 explain why Rajesh's workings are wrong?
If x^2 is added to x, the sum is 56. Which of the following could be the value of x?
What do you think Gompers meant when he said “workers must emancipate themselves”?
A form or type of democracy used in the United States is a
Kurt's truck uses 12 gallons of gas to travel 156 miles. He has 6 gallons in the tank. How much more gas will he need to drive 351 miles?
Which author's purpose attempts to convince the reader? Explain Entertain Persuade Inform
how would you change x + 3y = 18 -3x - 12y = -75 to eliminate y
Alexander threw a dart at this board a total of 40 times. Predict the number of times the dart will land on the number 3.PLZ HURRY
Provide an outline of the structural subject matter of Washington's address. What are some of the topics he covers? I need 6 bullet points
Help me pleaseeeeeeeee
