Proving expressions in Trigonometry

Asked by  | 24th Sep, 2008, 06:39: PM

Expert Answer:

this expression is wrong.

to check this, simply put A=B = 45o

LHS =  (1-cos45o +cos90o) / (1+cos45o +cos90o) = (2-1) / (2+1)

RHS = tan (45o/2) cot (45o/2) =1

since LHS RHS

i.e. this cant be proved.

Answered by  | 17th Dec, 2008, 12:41: AM

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