Before the use of calculators, mathematicians developed and used detailed tables of values of the sine, cosine and tangent ratios for any given angle. for example: (look the what would have been the main purpose for developing these tables?

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Simplify the expression. -2/5(10+15m-20n)

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?