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Let `alpha, beta` are the root of equation `acostheta + bsintheta = c`. If `alpha = 30^(@)` and `beta = 60^(@)` such that `a, b, c` represent sides of a `DeltaABC` thenA. `ABC` is acute angle triangleB. `ABC` is acute isosceles triangleC. `ABC` is right angle triangleD. `ABC` is obtuse angle triangle |
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Answer» Correct Answer - A::B `alpha = 30^(@)` and `beta = 60^(@) rArr (a)/(2) = (b)/(2) = (c)/(sqrt(3) + 1)` `rArr cosC = (2 - sqrt(3))/(4) gt 0` `rArr angle(C)` is acute angle and `a = b` represents `angleA = angleB` |
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