Verify if this is an identity

cot (-x) tanx=-1

How do I find the missing angle on a triangle

The Griffins bought a new car for $23,865. The total price was $26,959 which included $1,589 for tax and license, $742 for shipping, and payment for accessories. How much were the accessories?

If you need carpet that is 6 1/2 long and 5 3/4 wide how many square feet do you need for the carpet? I'm so confused on this question

Eight members of an origami club will make a paper chain the chain is 4 feet long each member will make an equal part of the chain how much of the chain in feet will each member make

A helicopter leaves an airport and flies south at 180 mi/h. Thirty minutes later, an airplane leaves the airport and follows the same route as the helicopter, only at a higher elevation. The airplane is flying 330 mi/h.

The number of gallons of water in a tank that already has 300 gallons in it after being filled at 35 gallons per minute for m minutes

The Tennis Teams of Atlanta need to older tennis balla for the upcoming tournament. They will need 2,367 tennis balls. If each can hold 5 tennis balls, how Many will they purchase

42 is subtracted from 42% of a number. The result is 42. What is the number?

The temperature is changing every day by negative 7 over 18 degrees Fahrenheit. What will be the change in the temperature after 3 days?

The equation of the polynomial function is: f (x) = (x + (2 + i)) (x + (2 - i)) (x + 5) f (x) = (x - (2 + i)) (x - (2 - i)) (x - 5) f (x) = (x - (2 + i)) (x - (2 - i)) f (x) = (x + (2 + i)) (x - (2 - i)) (x - 5)