Question

if cos²-sin²=1/2 then find the value of cos⁴-sin⁴?
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Answer 1

Step-by-step explanation:

(cos²)²-(sin²)²=(1/2)²

cos⁴-sin⁴=1/4

Answer 2

Answer:

cos²-sin²=1/2

cos⁴-sin⁴=1/2

Step-by-step explanation:

cos²-sin²=1/2

(cos²)²-(sin²)²=(1/2)²

2•cos⁴-sin⁴=1/4

cos⁴-sin⁴=1/4/2

cos⁴-sin⁴ =1/4•2

cos⁴-sin⁴=1/2