girinamisha girinamisha

13-03-2020
Mathematics

contestada

If tan²A = 1+ 2tan²B
Show: COS2B = 1+2 cos2A

Respuesta :

ghanami ghanami

13-03-2020

Answer:

Step-by-step explanation:

hello :

here is this idea :

tanA= sinA/cosA tanB= sinB/cosB

cos²A+sin²A =1 cos²B+sin²B =1

cos²A-sin²A=cos2A cos²B-sin²B=cos2B

Answer Link

Otras preguntas

Multiply the reciprocals of -9/2 and 5/18 and add the additive inverse of -4/5 to the product. What is the result?

what is an example of an open system

The California license plate has one number followed by three letters followed by three numbers. How many different license plates are possible? Do not use comm

Which expression is equivalent to 24 ⋅ 2−7?

A hockey puck slides on the ice and eventually stops. How would Newton interpret this behavior?

without seeing a figure is it possible to give another name for

How might you eliminate the x-term from the bottom equation? 5x - 3y = 6 5x + 12y = 12

what is an example of an open system

Before the Constitution could go into effect, __________ of __________ states were required to approve it.

Which is one factor that adds to the greenhouse effect? a decrease in the amount of dust in the atmosphere a decrease in the amount of water on Earth's surface