August 2018 1 27 Report
Sprawdź tożsamości (α jest kątem prostym)

a) (sinα+cosα)²+(sinα-cosα)²=2

b) (1+sinα)(1/cosα - tgα)=cosα

c) cos⁴α-sin⁴α=cos²α-sin²α

/ to znaczy ułamek.

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