Math (Triangles - (Angle of Elevation)
A television antenna is situated atop a hill. From a point 200 m from the base of the hill, the angle of elevation of the top of the antenna is 80°. The angle of elevation of the antenna from the same point is 75°. How tall is the antenna?
The vertex angle of an isosceles triangle is 40°20'. Each of the leg measures 320 mm. Find the length of the base.
f(x) is a function differentiable at x=1 and f′(1)=1/13. What is the limit of (x^3 - 1)/f(x) - f(1) as x approaches 1?
If f(x)=(x+1)^2/(2x+1)^3, then f′(1)= −a/b. What is a and b?
What is the maximum value of f(f(x)) in the domain 4≤x≤7 for the function f(x)=x^2−10x+22?
May I know how to compare please? What are the steps? Thanks...
Consider the graph of the quadratic function y=ax^2+bx+c. If it passes through two points P=(6,0) and Q=(14,0), and its vertex is on the line y=−16x, what is the value of a+b+c?
If the function y=(x^2−2x)^2+6x^2−12x has the minimum value b at x=a, what is a−b?
why is a hydrogen molecule (H2) more stable than two individual hydrogen atoms?