(Cos^+sin^)2-(cos^-sin^)2
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Answer:
Cos²+Sin²-cos²-sin²
=2
Step-by-step explanation:
Given
Cos²+Sin²-cos²-sin²
By bringing together similar ones we get
Cos²-cos²+Sin²-sin² [.°.Cos²-cos²=1 and Sin²-sin²=1]
= 1+1
= 2.
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