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

Plot and connect the points A(-4, 5), B(2, -4), C(-4, -4), and find the area of the triangle formed.

PLEASE HELP ME ASAP Use the excerpt from William Graham Sumner, "On Empire and the Philippines" (1898) What future did William Graham Sumner predict for the Ame

What is the main role of enforcement and compliance?.

Which pair or pairs of polygons are congruent? pair 1 pair 2 pair 3

What two things happened to protect factory workers from abuse? Factories went out of business. Labor unions were formed. Laws were changed. Children were emplo

Does anyone know #13????

what are the steps to solving 7(x+2)=91X=11

WOULD YOU RATHER live in a manssion or a nice house

Fill in the blank with the correct word. Die Tante ist die Schwester ______ Mutter. die des der dem

In a school 50% of learner's are younger than 10 , 1/20 are 10years old and 1/10 are older than 10 but younger than 12, the remaining learner's are 12 years old