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4:54
YouTube
Cowan Academy
How to Solve cos(x) + sin(2x) = 0 (Trigonometric Equations)
Trigonometric equation example problem detailing how to solve cos(x) + sin(2x) = 0 in the range 0 to 360 degrees by substituting trig identities. In this example, we substitute the double-angle identity for sin(2x) and make use of the unit circle, trig triangle ratios and CAST diagram to find the principle angles for our solution. Music by ...
25.3K views
Feb 8, 2020
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