Question

9. If sin A + sin² A = 1, then value of (cos²A + cos⁴ A) will be :
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Answer 1

Answer:

1

Step-by-step explanation:

sinA+sin²A=1

sin²A+sin⁴A=1

1-cos²A+(1-cos⁴A)=1

2-cos²A-cos⁴A=1

-cos²A-cos⁴A=1-2

cos²A+cos⁴A=1 multiplying by-1