1)2tg41°•tg131° 2)sin34°•cos34°/sin68°3)cos142°/sin^2 71°- cos^2...

Question

1)2tg41°•tg131° 2)sin34°•cos34°/sin68°3)cos142°/sin^2 71°- cos^2 71°4)tg15°•ctg15°5)cos^2 31°+sin^2 31°​

Answer 1

Ответ:

Объяснение:

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