Introduction to the Trigonometric Ratios
Explanation
Trigonometry studies angles and sides of right triangles using ratios.
Ratios: sin, cos, tan (opposite, adjacent, hypotenuse)
Example:
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Right triangle, angle θ = 30° → sin 30° = 1/2, cos 30° = √3/2, tan 30° = 1/√3
Trigonometry allows solving unknown sides/angles without measuring.