Mathematical formula on blackboard
Mathematical formula on blackboard
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Photo credit: © Lyroky / Alamy / Afripics
License: Royalty Free
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Keywords: algebra, angle, angles, arithmetic, blackboard, calculation, chalk, chalkboard, constant, cosine, division, equation, expression, formula, fraction, information, math, mathematical, mathematics, maths, notation, problem, science, solution, symbol, symbolic, symbols, teach, teaching, theta, trigonometry, variable, variables
