11-03-2017
Mathematics

contestada

Show that cos(A+45)=cos45(cosA-sinA)

Respuesta :

ghanami ghanami

11-03-2017

Hello here is a solution :
co(a+b) =cosacosb -sina sinb
cos(A+45)=cosAcos45-sinAsin45
cos45=sin45

cos(A+45)=cosAcos45-sinAcos45=cos45(cosA-sinA)

Answer Link

Otras preguntas

Help me please >.< ---------------------

How would you describe the change in the arrangement of particles as heat energy and temperature increase?

I am a number less than 3,000.when you divide me by 32,my remainder is 30.when you divide me by 58 ,my remainder is 44.What number am I?

how many different (non-conguerent) triangles have integer side lengths and perimeter 2014

which word comes from a latin word meaning lattice

At the veterinarian's office, 4 animals out of every 5 seen were cats. A total of 35 animals were seen.a. How many cats were seen?b. The ratio of male cats seen

I really need help on geometry

By default, text is _____ in a cell A.) left-aligned b.) centered C.) justified D.) right-aligned

President Woodrow Wilson's statement "The world must be made safe for democracy" was made to justify his decision toa. end United States imperialism in Latin Am

What are three most common types of land forms in Washington