Hellos How do you prove this?
tan(θ)−sin(θ) tan(θ)+sin(θ) ​ = sin(θ)^2 / (1+cos(θ))^2 ​

Name the most appropriate metric unit for each measurement like a length of an carrot

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Simplify (4x^2 - 8xy + 2y^2) - (9x^2 - 4xy - 7y^2) a. -5x^2 + 4xy + 9y^2 b. -5x^2 - 4xy + 9y^2 c. -5x^2 + 12xy + 4y^2 d. -5x^2 - 4xy - 5y^2