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A Youtube video from MrHelpfulNotHurtful
A Youtube video from Daniel Thomander
Students see Mr. T's right angle triangle machine capture the data proving that the sine and cosine of complementary angles are the same
A Youtube video from Erin Talley
Discusses the relationship between the cosine and sine of complementary angles in a right triangle
A Youtube video from grant dempsey
Excellent review and exercises from MathBitsNotebook.com
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