# Trigonometry Question

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## Grade 11 Trigonometry CCSS: HSG-SRT.D.10

- The law of sines is not valid for right triangles.
- The law of sines can only be proved for the acute angles of a right triangle.
- The law of sines can be easily proved for a right triangle, using trig ratios and the fact that [math]sin(90°)=1[/math].
- The law of sines can proved for a right triangle, and the easiest proof involves the use of the Pythagorean Theorem and the formula for the area of a triangle.