19-07-2017
Mathematics

contestada

simplify the expression by using a double angle formula

cos^2 4theta-sin^2 4theta

Respuesta :

mathmate mathmate

19-07-2017

Double angle formula for cos(2x) is
cos(2x)=cos^2(x)-sin^2(x)

Substitute x=4theta, then
cos(8theta)=cos^2(4theta)-sin^2(4theta)
=>
cos^2(4theta)-sin^2(4theta) = cos(8theta)

Answer Link

Otras preguntas

Which was committed to the creation of a Jewish homeland in the Middle East? A) Zionism B) pan-Arabism C) the Palestine Liberation Organiz

Which word is opposite in meaning to practical? unreasonable reconnected destroyed disinterested

Which event marked the end of fighting during World War I? the signing of the Treaty of Versailles the Spanish flu pandemic the armistice the signing of the Tre

Who Was First Lady Finance Minister Of Free India?

Write about situations in which you think compromise is appropriate and situations in which you thing compromise is not appropriate.

what is the simplified form of x^4-81/x+3

In which country did the original stupa evolve into a pavilion-like watchtower?

A school requires an entrance exam score that is in the top 3% of the population in order to be accepted. If an entrance exam has a mean of 500 and a standard d

If I fly from USA to Mexico, can I re-enter by car to the USA?

In The 1700s What Type Of Government Existed In Most European States?