Question

3. P.T. cotA-Cos A
Cot A+ Cos
Cosec A-1
Cosec Atl​

Answer 1

hi

Solution :

L.H.S.=cotA−cosAcotA+cosA=cosAsinA−cosAcosAsinA+cosA

=cosA(1sinA−1)cosA(1sinA+1)=(1sinA−1)1sinA+1

=cosecA−1cosecA+1=R.H.S

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