Ask a New Question

Question

This is similar to a question i seen below but how do i write cos^2 4-sin^2 4 as a single trigonometric function?
And 1-2sin^2 3
9 years ago

Answers

Reiny
Have you come across this identity and its variations?

cos 2A = cos^2 A - sin^2 A
= 1 - 2sin^2 A
= 2cos^2 A - 1

so ....
cos^2 4-sin^2 4
= 1 - sin^2 4 - sin^2 4
= 1 - 2sin^2 4
= cos 8

1 - 2sin^2 3
= cos 6
9 years ago

Related Questions

My question is similar to Avik's but with different values. A camera, located 4 km from the laun... I posted a question similar to this one a few days ago and someone helped me with it. but now im on... I've got a similar question as a previous student. What is a minimum volume (in gallons) of ethy... This question is similar to some on driver's-license exams: A car moving at 50 km/h skids 15 m with... Similar question to http://www.jiskha.com/display.cgi?id=1474753951 "If that 22.33g sample of cal... asked a question similar to this one but wanted to make sure I am on theright track so for this que... I saw a similar question to this. Before you answer this, we are not the same person. A pilot pla... Question Which was one similarity between the Middle Colonies and the New England Colonies? (1 poi... This question is similar to ones you will find on Reading Challenges. Some call him a whistle pig... Question Which was a similar factor of the conflicts in Korea and Vietnam? (1 point) Respo...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use