Pythagorean trigonometric identity on a blackboard Stock Image
by PixelsAway
Description
Pythagorean trigonometric identity handwritten with white chalk on a blackboard
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Keywords
- Pythagorean
- trigonometric
- identity
- theorem
- sine
- cosine
- function
- mathematics
- algebra
- blackboard
- chalkboard
- chalk
- white
- black
- smudge
- eraser
- dust
- patter
- texture
- nobody
- horizontal