sec a (1-sin a)(sec a+tan a)=1
add 5y to the product of a and b an algebric expression
If 2x = 1/3(x-2)-2 then x = -1.6
0.5% of x is 45
(1/2)(3x+1)=(3/2)-(1/2)(2-x)
if 2x+1 is one factor of the polynomial 2x² + 3x + 1 then find the other factor
(1/2)(2x+5)-(1/3)x=x-1
[-8×2/7+11]/2/7+1
Prove that 2/π ≤ sinx/x ≤ 1 for all x ∈ (0, π/2).
