SINCE the publication of Prof. Zygmund's “Trigonometric Series” in 1935, there has been considerable demand for another book dealing with trigonometric integrals. Prof. Titchmarsh's book meets this ...
A muscle strain (pulled muscle) happens when muscle fibers overstretch, causing sudden pain, swelling, weakness, or bruising. Strains often affect the lower back, neck, shoulders, or hamstrings.