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Using a right triangle evaluate for your six trig functions

665 views · Published 19 January 2012 · 4:52 · Indexed 23 October 2026

Channel: Brian McLogan · 2012 · Education

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👉 Learn how to evaluate the six trigonometric functions given the value of one of the trigonometric functions. When given the value of one of the trigonometric functions of an angle, we can evaluate the values of the other trigonometric functions by first using the SOHCAHTOA principle to sketch the appropriate right triangle in the appropriate quadrant depending on the sign of the known trigonometric function.

Next, we use the Pythagoras rule to find the remaining side length of the triangle and then use the SOHCAHTOA principle again to find the rest of the trigonometric functions.

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Organized Videos:
✅ Evaluate the Trigonometric Functions With Triangles
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMpL-gBoO-oUcgfESuGouwt1
✅ Evaluate Trig Functions Using Special Right Triangles
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMqeZEkcEqjW4ULIDrp3Tv9b
✅ Evaluate the Six Trig Functions Given Right Triangle
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMr1UW78F2In_OGR3MaaJ4ym
✅ Evaluate the Six Trig Functions Given Equations
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMpICVpjVGcVH9RQxh4rrpTK
✅ Evaluate Trig Functions from a point | Learn About
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMruA-hHsUBqd9w9MZnna8Uo
✅ Evaluate the six Trig Functions given a point
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrGKkeI5vnQ2ygIh_UIKUF1
✅ Determine the Quadrant Given Constraints
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrEMHVH_uzY3J_yYZbd6Wfc
✅ Evaluate the trigonometric function with constraint
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMonO8-XMTKTlKXqK2-7xQiG

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