If cos2A + cos2B + cos2C = 1 then ABC is a
(a) Right angle triangle
(b) Equilateral triangle
(c) All the angles are acute
(d) None of these
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Answer Posted / cryolife
If cos2A + cos2B + cos2C = 1 then ABC is a Right angle
triangle.
Ans is (a).
| Is This Answer Correct ? | 29 Yes | 5 No |
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