Question

If sin² = 1\5 then 1 - cos²
- =​

Answer 1

Answer:

1/5

Step-by-step explanation: sin²Ф + cos²Ф= 1

⇒sin²Ф = 1 - cos²Ф

so, if sin²Ф=1/5

1-cos²Ф is also equal to 1/5