coto + tano = coseco seco
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Assume 0 as theta ok
COS0÷SIN0+SIN0÷COS0
COS20+SIN20÷SIN0×COS0
1÷SIN0×COS0(COS20+SIN20=1)
WRITE BOTH SEPRATELY
1÷SIN0×1÷COS0
COSEC0×SEC0
(1÷SIN0=COSEC0)AND (1÷COS0=SEC0)
HENCE,L.H.S=R.H.S
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