Prove that tan pi/4+a/2=root1+sina/1-sina=(1+sina) /cosa

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Ineed on these fraction questions! could'ya me? 1. 3/8 ( ? ) 0.295 a. = b. > c. < 2. -0.770 ( ? ) -4/5 a. = b . < c. >

Abusiness plan is centered around a circular area of distribution. the plan calls for the radius of the distribution to increase 50 miles per year. the investors have asked that the plan include a reference to the area of distribution based on the number of years in business. these functions model this plan: radius in y years: r(y) = 50y total area: a(r) = πr2; r in miles what is a(r( the total area in y years? a(r(y)) = 50πy2 a(r(y)) = 2,500πy2 a(r(y)) = 50πr2 a(r(y)) = 2,500πr2