In ABC triangle, the following equation holds, find each angle.?

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In ABC triangle, the following equation holds, find each angle.?

cosAcosB+sinAsinBsinC=1

Please find angles A, B and C in ABC triangle.

2007-07-07 06:39:18 · 3 answers · asked by Amir 1 in Science & Mathematics ➔ Mathematics

3 answers

m m

2007-07-07 06:47:26 · answer #1 · answered by alpha 7 · 0⤊ 0⤋

A = B= 45 degrees C= 90 degrees

2007-07-07 07:19:23 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋

ok so first draw it. word: attitude A is accross from part a and B from b and C from c. so all of us be conscious of attitude B=40 5 part a=2 and part c=4 regulation of cosines= c^2=a^2+b^2 - 2abCosC So use the regulation to high-quality b and then use that to discover c

2016-11-08 10:00:21 · answer #3 · answered by Anonymous · 0⤊ 0⤋