Which of the following option is correct & How ?

Asked by spuneet23 | 9th Sep, 2010, 07:13: PM

Expert Answer:

In Mathematics, to prove a statement we require a rigorous proof, but to disprove only one example is sufficient.As we are dealing with any triangle ABC,consider the triangle ABC, whereA= 450, B = 450 and C = 900cos A = 12=cosB  and cos C =0cos A +cos B + cos C = 12+12+0 =22=2 <32cos A -cos B + cos C=0 <32cos A +cos B - cos C= 22=2 <32Hence option (A) cos A +cos B + cos C  32is correct">

Answered by  | 9th Sep, 2010, 10:30: PM

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