If sin A + sin² A = 1, then the value of cos² A + cos⁴ A is :
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Answered by
1
Step-by-step explanation:
sinA + sin²= 1 {given}
sinA = 1−sin²A
sinA = cos²A
Now
cos²A + cos⁴A
= > cos²A + cos²A×cos²A
= sinA + sin²A
=1
therefore,
ans: 1 .
Answered by
1
Answer:
sinA+sin2=1
sinA=1−sin2A
sinA=cos2A
Now
cos2A+cos2A.cos2A
=sinA+sin2A
=1 ...(given)
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