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OpenStudy (alinaa1024):
If sin θ = 21 over 29, use the Pythagorean Identity to find cos θ. A. cos θ = ± 8 over 29 B. cos θ = ± 21 over 20 C. cos θ = ± 29 over 20 D. cos θ = ± 20 over 29
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OpenStudy (alinaa1024):
@ThereisnoUsername
OpenStudy (thereisnousername):
sin Θ = 21 over 29, that tells you the "opposite side" is 21 and the 29 is the hypotenuse so lets draw a triangle and fill in these numbers |dw:1464973582615:dw|
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