lesleal31 lesleal31

04-05-2017
Mathematics

contestada

Rewrite cos2 67.5° – sin2 67.5° using a double-angle identity.
cos 135°

sin 135°

cos 33.75°

sin 33.75°

Respuesta :

zebsi0n zebsi0n

04-05-2017

The Double Angle identity for cos is as follows:
[tex]cos(2a)=cos^2(a)-sin^2(a)[/tex]
Because this is the same form as the equation you asked for, just double 67.5 to get cos(135).

Answer Link

Otras preguntas

Five times a number decreased by 2 is 4, find the number.

The cells ____ and shrivel up

Angle ABC is taken by a dilation with centerpoint, P and scale factor of four to angle A’B’C’ the measure of angle, BCA is 75° what is the measure of angle B’C’

( i only need number one and number 7 ) someone please i’m desperate i have so much work i need done by monday even if you only do one of them it is greatly app

A population of 50 foxes in a wildlife preserve doubles in size every 14 years. The function y = 50.2*, where x is the number of 14-year periods, models the pop

373646351636646475753626266374747574884x848484893990299149440505944330309877=?

Help me with ixl please

All are true about the American Revolution EXCEPT Many soldiers died from cold and disease at Valley Forge. The colonists did not receive any foreign aid during

373646351636646475753626266374747574884x848484893990299149440505944330309877=?

In how many ways can a committee of five Democrats and four Republicans be formed from a group of twelve Democrats and twelve Republicans?