If sin tita + sin² tita = 1 then cos² tita + cos⁴ tita is?
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Step-by-step explanation:
sin + sin² = 1
sin= 1 - sin²
sin= cos²
now,
cos²+ cos² ( sin= cos²)
sin + sin²
sin+ 1- cos²
sin+ 1 - sin
=1
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