Question

Sin A + Sin²=1
Find Cos²A + Cos ^4A​

Answer 1

Step-by-step explanation:

sin²A + cos²A=1

=> sinA = cos²A

thus,

sin²A=(cos²A)²

sin²A=cos⁴A

thus,

to find:

cos²A+cos⁴A

=> cos²A+sin²A

= 1

1 is your answer mate!!

Answer 2

Answer:

1

Step-by-step explanation:

sin A+sin²A=1

sinA=1-sin²A .........(i)

cos²A+cos⁴A

cos²A(1+cos²A)

(1-sin²A)(1+1-sin²A) From (i)

sinA (1+sinA)

sinA+sin²A (given)

1