Exposed steel rusts extremely slowly in the Antarctic.

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Need on this geometry question. explain how you did it.