A,B,C are interior angles of
TriangleABC prove that
Cosec(A+B/2) =sec C/2
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Step-by-step explanation: for 2 marks
A+B+C=180 (angle sum property)
A+B=180-C
LHS =>cosec(A+B)/2
=> cosec(180-C)/2
=> cosec 90-C/2
=> sec C/2
HENCE PROVED
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irshadshama52:
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