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sayyadmohd78:
i know how to solve
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Given :
[ 1 - cos Ф + sin Ф ] / [ cos Ф + sin Ф - 1 ]
Divide both numerator and denominator by cos Ф :
⇒ [ 1/cos Ф + 1 + sinФ/cosФ ] / [ 1 + sinФ/cosФ - 1/cosФ ]
Use 1/cos Ф as sec Ф and sin Ф / cos Ф as tan Ф :
⇒ [ secФ + tanФ + 1 ] / [ 1 - sec Ф + tan Ф ]
Use sec²Ф - tan²Ф = ( sec Ф + tan Ф )( sec Ф - tan Ф ) = 1
⇒ [ sec Ф + tan Ф + ( sec Ф + tan Ф )( sec Ф - tan Ф ) ] / [ 1 - sec Ф + tan Ф ]
⇒ [ sec Ф + tan Ф ] ( 1 - sec Ф + tan Ф ) / ( 1 - sec Ф + tan Ф )
⇒ sec Ф + tan Ф
⇒ 1/cosФ + sinФ/cosФ
⇒ ( 1 + sin Ф )/ cosФ
Hence proved !
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if there is something wrong then kindly rectify it.
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