As sal said in the video, sin a = 90-cos a. and cos a = 90-sin a.

angle a has sin 54. what is the cos for that angle? how do you know?

what is cos b? how do you know?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

The temperature of chicken soup is 192.7°f. as it cools, the temperature of the soup decreases 2.3°f per minute. what is the temperature in degrees fahrenheit of the soup after 25 minutes? a. 27.3°f b. 57.5°f c. 135.2°f d. 250.2°f

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose