Question

IF CosA+cos2A=1,then find the value of sin2A+sin4A

plss help fast

class 10th​

Answer 1

Cos A+Cos2A=1
=> cosA = 1 – cos2A = sin2A

So, Required is

sin2A + sin4A
= Cos A+Cos2A
=1

Answer 2

Cos A+Cos2A=1

=> cosA = 1 – cos2A = sin2A

So, Required is

sin2A + sin4A

= Cos A+Cos2A

=1