txdyctfyf
txdyctfyf
19-04-2021
Mathematics
contestada
factorise cos^2a - sin^2a
Respuesta :
23janelledubin
23janelledubin
19-04-2021
Answer:
cos(2a)
Step-by-step explanation:
cos²(a)-sin²(a)=cos(2a)
cos²(a)-sin²(a)
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