Oblicz : 1. cos²α - sin²α = 1 - 2 sin²α
1-sin²α-sin²α= 1 - 2 sin²α
1 - 2 sin²α=1 - 2 sin²α
L=P
2. 1/cos²α - cos α = sinαtg α
1/cos²α - cos α = sinα*sinα/cosα
1/cos²α - cos α =1-cos²α/cosα
1/cos²α - cos α =1/cos²α - cos α
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Oblicz :
1. cos²α - sin²α = 1 - 2 sin²α
1-sin²α-sin²α= 1 - 2 sin²α
1 - 2 sin²α=1 - 2 sin²α
L=P
2. 1/cos²α - cos α = sinαtg α
1/cos²α - cos α = sinα*sinα/cosα
1/cos²α - cos α =1-cos²α/cosα
1/cos²α - cos α =1/cos²α - cos α
L=P