document.write( "Question 140509: I need to find angles and sides for this right triangle but I dont know how and cant find any examples anywhere to help(I don't know how because of angle A)
\n" ); document.write( "Find side a and b given in two decimal place and find \n" ); document.write( "Angle A is Pi/10 and side c is 43.8
\n" ); document.write( "Please help.
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Algebra.Com's Answer #102302 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Angles can be measured in different units just like length can be measured in inches and in millimeters (and a lot of other units).
\n" ); document.write( "Two commonly used units are degrees and radians.
\n" ); document.write( "A circle, like a clock, sweeps 360 degrees.
\n" ); document.write( "In radians, it would be \"2%28pi%29\" radians.
\n" ); document.write( "So the conversion factor is \"2%28pi%29%2F360\" to go from degrees to radians.
\n" ); document.write( "The conversion factor to go from radians to degrees is \"360%2F%282%28pi%29%29\".
\n" ); document.write( "The angle A is \"%28pi%29%2F10\" radians or 18 degrees.
\n" ); document.write( "Let's call the side oppposite angle A, side b.
\n" ); document.write( "Let's call the side adjacent (next to) angle A, side a.
\n" ); document.write( "Side c is the hypotenuse of the right triangle.
\n" ); document.write( "From trignometry,
\n" ); document.write( "\"sin%28A%29=b%2Fc\"
\n" ); document.write( "\"b=c%2Asin%28A%29\"
\n" ); document.write( "\"b=43.8%2Asin%2818%29\"
\n" ); document.write( "\"b=43.8%2A0.3090\"
\n" ); document.write( "\"b=13.53\"
\n" ); document.write( "Since it's a right triangle, you can use the Pythagorean theorem to find a.
\n" ); document.write( "\"a%5E2%2Bb%5E2=c%5E2\"
\n" ); document.write( "\"a%5E2%2B%2813.5%29%5E2=%2843.8%29%5E2\"
\n" ); document.write( "\"a%5E2%2B183.19=1918.44\"
\n" ); document.write( "\"a%5E2=1735.25\"
\n" ); document.write( "\"a=41.66\"
\n" ); document.write( "You could have also use the cos(A).
\n" ); document.write( "\"cos%28A%29=a%2Fc\"
\n" ); document.write( "\"a=c%2Acos%28A%29\"
\n" ); document.write( "\"a=43.8%2Acos%2818%29\"
\n" ); document.write( "\"a=43.8%2A0.9511\"
\n" ); document.write( "\"a=41.66\"
\n" ); document.write( "a=41.66
\n" ); document.write( "b=13.53
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