Question

if sinA + sin2A = 1 then the value expression (cos2A + cos4A)​

Answer 1

Step-by-step explanation:

Answer : → 1 . → sin∅ + sin²∅ = 1

Answer 2

Answer:

its from ncert exampler

sinA+sin∧2A=1

sinA=1-sin∧2A  

sinA=cos2A                (1-sin∧2A=cos∧2A)

squaring both sides

sin∧2A=cos∧4A

1-cos∧2A=cos∧4A

1=cos∧4A+cos∧2A ans