ngikepsng
ngikepsng
19-07-2016
Mathematics
contestada
verify -tan^2x+sec^2x?
Respuesta :
dalendrk
dalendrk
23-07-2016
[tex]We\ know:\\\\\tan x=\dfrac{\sin x}{\cos x}\\\\\sec x=\dfrac{1}{\cos x}\\\\\sin^2x+\cos^2x=1\to \cos^2x=1-\sin^2x\\-----------------------\\\\-\tan^2x+\sec^2x=-\dfrac{\sin^2x}{\cos^2x}+\dfrac{1}{\cos^2x}=\dfrac{-\sin^2x+1}{\cos^2x}=\dfrac{-(1-\sin^2x)}{\cos^2x}\\\\=\dfrac{-\cos^2x}{\cos^2x}=-1[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 56+ )
Otras preguntas
if bob earns 35,000 a month how much does he earn in 2 years and 75 weeks
Both multiparty systems and two-party systems are designed to be responsive to the people. That is, they are designed to promote the election of officials who r
Solve this equation for x in terms of y: 3x+2y=4
what is 5 square root of 54
Calculate the number of moles 56.75 g of Al(NO3)3 8.35 g of Al2(SO4)3 3.8 g of FeSO4
please help!!! Given the length of three sides of a triangle, which is a right triangle? (1) 10,26,24 (2) 20,12,18 (3) 30,15,26 (4) 40,50,80 And also explain wh
how many counts does a semibreve have
why do humans need nitrogen to survive?
Both multiparty systems and two-party systems are designed to be responsive to the people. That is, they are designed to promote the election of officials who r
why do humans need nitrogen to survive?
