cos A-sin A)2–(cos A+ sin A)2= _____.
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Answered by
3
Answer:
0
Step-by-step explanation:
=(cosA-sinA)² - (cosA+sinA)²
=cos²A-2cosAsinA+sin²A-cos²A+2sinAcosA-sin²A
=1-1-2cosAsinA-2sinAcisA
=0
Answered by
0
Answer: zero
Step-by-step explanation: by using identity
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