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 ( 28+ )
Otras preguntas
What volume of 0.120 M HNO3(aq) is needed to completely neutralize 150.0 milliliters of 0.100 M NaOH(aq)? (1) 62.5 mL (3) 180. mL (2) 125 mL (4) 360. mL
In which 0.01 M solution is phenolphthalein pink? (1) CH3OH(aq) (3) CH3COOH(aq) (2) Ca(OH)2(aq) (4) HNO3(aq)
Which revision best corrects the errors in the given sentence? Our relatives often delayed by traffic usually come in the late afternoon. A. Our relatives (of
How do you find the are of the circle and the square
The region that is the most probable location of an electron in an atom is (1) the nucleus (3) the excited state(2) an orbital (4) an ion
Which sentence does not contain any punctuation errors? A. The car will be repaired by Fri Oct 12. B. The car will be repaired by Fri, Oct 12. C. The car wil
What gas was present in earth's earliest atmosphere and used by cyanobacteria during photosynthesis? A. oxygen B. carbon dioxide C. nitrogen D. methane
Which statement describes what occurs as two atoms of bromine combine to become a molecule of bromine? (1) Energy is absorbed as a bond is formed. (2) Energy is
What causes mountain ranges to form?
Which of these substances has the strongest intermolecular forces? A. H2O B. H2S C. H2Se D. H2Te
