kasss03 kasss03

24-07-2020
Mathematics

contestada

HELPPPP Cos x cosy = 1/2(sin (x+y)+ sin (x-y)) true or false

HELPPPP Cos x cosy 12sin xy sin xy true or false class=

Respuesta :

cristhiansanchez94 cristhiansanchez94

26-07-2020

Answer:

Step-by-step explanation:

REcall that sin(a+b) = sin(a)cos(b)+cos(a)sin(b). Then

sin(a+b)+sin(a-b) = sin(a)cos(b)+cos(a)sin(b) + sin(a)cos(b) -cos(a)sin(b) = 2sin(a)cos(b). Then

sin(a)cos(b) = (1/2)(sin(a+b)+sin(a-b))

So it is false

Answer Link

Otras preguntas

What are the men looking for in the Wrights' house?

if x= -1 and y=2 is the solution of the simultaneous equations, ax-by= 1 ay+bx= - 7 find the value of a and b with the proper steps

The graph shows the amount of gas in the tank of Bill's car during a trip to his mom's house. At one point he stopped for gas. About how mush gas did Bill put i

The value of y varies directly with x. When y = 75, x = 1/2 What is the value of y when x = 18?

How will you justify the need of saprophytes in the ecosystem?

What is the economic system in the United States? traditional economy O command economy O planned economy O market economy

Which answer best describes the shape of this distribution? bell-shaped skewed left uniform skewed right

Where was the shining path from?

PLEASE HELP!! For systems of inequalities, graph each system on a coordinate plane to show the solution region. Next, use the graph to answer the question. Be s

Equipment consisting of busbars mounted inside an enclosure that provides a means of tapping the service-entrance conductors is called a