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Mathematics – Triangular Trigonometry II: Solving Trig Equations with a Calculator

This is the 1st lesson in the series, “Triangular Trigonometry II.” This lesson demonstrates how to use a scientific calculator to help us find to find the sin, cos or tan of an angle. It shows how to use the 2ndF or SHIFT key on your calculator, and the difference between finding a ratio and finding an angle. Source: Mindset Network