Question

if sin theta +sin^2 theta =1 prove that cos^2 theta + cos^4 theta = 1​

Answer 1

Answer:

Step-by-step explanation:

sin∅ + sin²∅ =  1

sin∅ + 1 - cos²∅ = 1 ( because sin²∅ + cos²∅ = 1)

sin∅ = cos²∅  .. . . ... (1)

now

cos²∅ + (cos²∅)² = 1

from (1)

sin∅ + sin²∅

1    H.P.