1-Sin Acos A
COSA ( SECA-CosecA)
×sin A- cos²A \
sin3A -cos3 A
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what to do ? write properly
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Answer:
Step-by-step explanation:
I= (1-sinA cosA) / cosA (sec A-cosec A)
= (1-sin A cos A) / cos A ((1/cos A) - (1/ sin A))
I = (1- sinA cos A) ( sin A cos A) / cos A (sin A -cosA )
II = (sin² A - cos² A) / (sin³ A - cos³ A )
= (sin A + cos A)(sin A -cos A) / (sin A + cos A)(sin² A- sin A cos A + cos² A)
= (sin A+ cos A)( sin A -cos A) / (sin A + cos A)(1- sin A cos A)
I *II = sin A (identical terms get cancelled )
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