exam
Maths Puzzle
Numerical Ability
please help me with my homework: using exact values, verify that cos 60 degrees = 1 - 2 sin^2 30 degrees.
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exam Other Question
Given g(x) = 3x^2 - x + 7, find [g(a + h) - g(a)]/h.
a. 6a + 3h + 1
b. 6a + 3h - 1
c. 6a + 3h + 2
d. 6a + 3h -2
e. none of these
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A triangular sail has an area of x^2 + 5x + 6 square meters and a height of x + 3 meters. Find the length of the sail's base.