DM M.

asked • 12/16/18

if a right triangle with acute angle of measure Ø, sin Ø = 1/2, use the Pythagorean identity to determine the value of cos Ø

this is on my final review, and i have a few questions, how would i get the Cos if I do not know the adj? Please explain this whole problem to me if possible, thank you.

1 Expert Answer

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Mark M. answered • 12/16/18

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If sin θ = 1/2, then opposite side = 1 and hypotenuse = 2.

The directions state

use the Pythagorean identity

to determine the third side.

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DM M.

is there a difference from the Pythagorean Theorem versus the Pythagorean Identity? and I realize sin is opposite over hypotenuse so what I did was 1² + x² = 2², and I ended up with radical 3 over 2 as my final answer, is this correct?
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12/16/18

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