Question

sin A + Sin square A = 1 then the value of cos square A+ Cos four A is​

Answer 1

Answer:

sinA+sin²A=1

or, sinA+sin²A=sin²A+cos²A

or, sin A=cos²A_____(i)

or, sin²A= cos⁴A______(ii)

i+ii, sinA+sin²A=cos²A+cos⁴A=1....proved