NidaFurqan NidaFurqan

28-10-2021
Mathematics

contestada

Given that cos (x) = k
what does cos (2x) = ?

Thanks in advance :)

Respuesta :

baileybobjoe2 baileybobjoe2

28-10-2021

Answer:

(2x) = 2k

Step-by-step explanation:

If x = k, then 1x=1k, then 2x=2k

Answer Link

lynnkc2000 lynnkc2000

28-10-2021

Answer:

2k² - 1

Step-by-step explanation:

cos x =k

cos 2x = 2 cos ² x - 1

= 2k² - 1

Answer Link

Otras preguntas

Write an article for publication in one of the national newspaper expressing your views on the topic:"The usefulness the of vacation classes

upon inspection and palpation of the scrotum, the nurse discovers a mass. the nurse asks the client to lie down, and the bulge remains. on auscultation, the nur

what is the definition of expected return? multiple choice question. it is the expected variation in return on a risky asset. it is the return that an investor

why is the analysis often for the worst case? (select all correct answers) a. worst-case analysis shows the exact execution time b. best-case is not representat

Select the correct text in the passage. Which sentence from paragraph 6 has the least objective tone? (6) Ultimately, that's what our democracy demands. It need

Given f(x), use Remainder Theorem to find f(4). f (x) = 2x^3 – 11x^2 + 7x - 5

Consider the transport of protons and sucrose into a plant cell by the sucrose-proton cotransport protein. Plant cells continuously produce a proton gradient by

what aimed to make their country richer and more powerful at the expense of other countries.

Mark each example of a physical change. Group of answer choices a pond freezes over in winter gasoline is burned in an engine butter melts in a microwave meat i

When in Rome do as the Romans do