uzoamakaagulanna uzoamakaagulanna

09-03-2021
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if sin x=4/5, find 1-cos^2x

Respuesta :

burchamiz burchamiz

09-03-2021

Answer:

cos(2x) = -7/25

Explanation:

cos(2x) = 1 - 2(4/5)2

cos(2x) = 1 - 2(16/25)

cos(2x) = 1 - (32/25)

cos(2x) = 25/25 - 32/25

cos(2x) = -7/25

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