Shakawaldgi Shakawaldgi

02-09-2016
Mathematics

contestada

sec^2x+2sec=0. solve the equation for 0

Respuesta :

HomertheGenius HomertheGenius

10-09-2016

u = sec x ( substitution )
u² + 2 u = 0
u ( u + 2 ) = 0
u = 0, or u = - 2
1/cos x = 0 1/cos x = - 2
(not accepted ) cos x = -1/2
x 1 = 2π/3, x 2 = 4π/3

Answer Link

Otras preguntas

Suppose an apple picker in China earns an average wage of 45 cents per hour. An apple picker can harvest about 2.0 bushels of apples each hour. One gallon of ap

In four to eight sentences, trace the flow of carbohydrate macromolecules through a rain forest ecosystem. State how the marcomolecules are produced, how they a

What do the different treatments of these figures suggest about the painters' purposes in the two portraits?

URGENT!! The quotient of the rational expressions

15. How would .89 be put as a fraction? 16. How would .234 be put as a fraction? 17. How would .6 be put as a fraction?

Find the common ratio of the geometric sequence: 2/3,−2,6,…

A current liability is a debt that is reasonably expected to be paid a. out of cash currently on hand b. within one year c. out of currently recogni

f(x)= x^2– 3x + 9 g(x) = 3x^3+ 2x^2– 4x – 9 Find (f - g)(x).

Help me please, ;) I could use it

ABG Corporation has the following dividend forecasts for the next three years: Year Expected Dividend 1 $ .25 2 $ .50 3 $ 1.25 After the third year, the dividen