Question

If sin A + sin? A = 1, then find the value of the expression (cos? A + cost A)​

Answer 1

Answer:

Given: sinA+sin²A=1

sinA=1-sin²A

sinA=cos²A

[ sin²A+cos²A]

squaring both sides, we get

sin²A=cos⁴A

1-cos²A=cos⁴A

cos²A+cos ⁴A

A=1