Prove this question..how it is solve?
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Hey here is your answer
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plzz mark me as brainlist
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raj1132:
I have another problem
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let me try to do this question:
(1-sinФ)(1+sinФ)
-------------------------
(1-cosФ)(1+cosФ)
by using identity (a²-b²)=(a+b)(a-b)
(1²-sin²Ф) cos²Ф
------------- = --------- =cot²Ф using identity(1-sin²Ф)=cos²Ф
(1²-cos²Ф) sin²Ф and (1-cos²Ф)=sin²Ф
cos²Ф
---------- =cot²Ф
sin²Ф
(1-sinФ)(1+sinФ)
-------------------------
(1-cosФ)(1+cosФ)
by using identity (a²-b²)=(a+b)(a-b)
(1²-sin²Ф) cos²Ф
------------- = --------- =cot²Ф using identity(1-sin²Ф)=cos²Ф
(1²-cos²Ф) sin²Ф and (1-cos²Ф)=sin²Ф
cos²Ф
---------- =cot²Ф
sin²Ф
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