Question

if cos square a + cos a=1 then find the value of 4sin square a + 4sin 4 + 2​

Answer 1

Answer:

please click the photo of ques then it can be told easily

Answer 2

Step-by-step explanation:

cos²A+cosA=1

cosA=1-cos²A

cosA=sin²A

4sin²A+4sin⁴A+2

4(sin²A+sin⁴A)+2

4(sin²A+(sin²A)²)+2

4(cosA+cos²A)+2

4(1)+2

4+2

6