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

The cost of a taxi ride includes an initial charge of $2.00. If a 5km ride cost $6.00 and 10km ride cost $10.Oo, determine the cost of a 15km ride.

Witch type of microscope is used to view very small cell components like proteins and DNA?

This law states that the "Chinese laborers to this country endanger the good order of certain localities" in the United States. Which of these would represent a

Serena is making an experiment. For that, she needs 20 grams of a 52% solution of salt. She has two large bottles of salt water: one with 40% and the other with

Read these lines from Denise Levertov's poem "In Thai Binh (Peace) Province": It is that life, unhurried, sure, persistent, I must bring home when I try to brin

what are the values of the maori cultures?

How are plants alike and different from their parents

PLEASE HELP WITH BOTH PROBLEMS. A.S.A.P DIRECTIONS ON PHOTO ^

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

What is the role of the ocular lens?