sinα+cosα=√2 /()²
sun²α+2sinα cosα + cos²α=2
sin²α+cos²α+2sinα cosα =2
1+2sinα cosα=2
2sinα cosα=1
sinα cosα=1/2
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sinα+cosα=√2 /()²
sun²α+2sinα cosα + cos²α=2
sin²α+cos²α+2sinα cosα =2
1+2sinα cosα=2
2sinα cosα=1
sinα cosα=1/2