amandaschweitzer amandaschweitzer

14-11-2016
Mathematics

contestada

Verify the identity
Cos^2x-Sin^2x=1-2sin^2x

Respuesta :

cutiepie32 cutiepie32

14-11-2016

From the basic definitions of sin and cos and the Pythagorean Theorem
cos2(x)+sin2(x)=1

or
cos2(x)=1−sin2(x)

So
cos2(x)−sin2(x)

=(1−sin2(x))−sin2(x)

=1−2sin2(x)

hope this helps.

Answer Link

Otras preguntas

A cyclist rides his bike at a rate of 12 miles per hour. What is this rate in miles per minute? How many miles will the cyclist travel in 2 minutes? Do not roun

What generates earths magnetic field?

Question 1 (Multiple (03.05 LC) plce Worth 6 points) Which group believed that failure to approve the Constitution would lead to chaos and mob rule? O Federalis

if x/-2=18 then wat is equal to x

What is the volume V of a sample of 4.00 mol of copper? The atomic mass of copper (Cu) is 63.5 g/mol, and the density of copper is 8.92 x 10^3kg/m^3.

. TEMPERATURE The average temperature in Calgary, Canada, is 22°C in July and -11°C in January. Find the range of the highest and lowest temperatures in Calgary

What are the four types of organic compounds?

2.4x-9.1x+12.5x=-39.44

Is better sleep Physical or Mental and Emotional

which energy technologies require using fossil fuels to start using electricity