please answer my question
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cosA/(1-tanA) - sin²A/(cosA-sinA)
= cosA/(1-sinA/cosA) - sin²A/(cosA-sinA)
= cos²A/(cosA-sinA) - sin²A/(cosA-sinA)
=(cos²A-sin²A)/(cosA-sinA)
=(cosA-sinA)*(cosA+sinA)/(cosA-sinA) (using identity a²-b²=(a-b)*(a+b))
=(cosA+sinA)
yadavyash13:
I don't understand
I just substituted tanA by sinA/cosA and proceeded further
but I don't understand it
I am not getting which step you did not understand
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