Leland Adriano Alejandro

I am an Electronics and Communications Engineer and a licensed Mathematics Teacher. Favorite subject is Integral Calculus. I teach College Algebra, Plane and Spherical Trigonometry, Analytic Geometry, Differential Calculus, and Secondary level Statistics and Probabilities. I am a Chess player and Musician. I also do Arts like Portrait Sketching using charcoal pencils when I have time.

4,753,387 students helped

Level 16 in Algebra Level 15 in Calculus Level 14 in Trigonometry Level 13 in Precalculus Level 12 in Geometry Level 11 in Prealgebra Level 10 in Statistics Level 10 in Physics Level 2 in Astronomy