Упростите выражение: 1)1-соs²α= 2)sin²α-1= 3)cos²α+(1-sin²α)= 4)sin²α+2cos²α-1= 5)(1-sin...

Question

Упростите выражение:

1)1-соs²α=

2)sin²α-1=

3)cos²α+(1-sin²α)=

4)sin²α+2cos²α-1=

5)(1-sin α)(1+sin α)=

6)(cos α-1)(1+cos α)=

Answer 1

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