Question

of cosa+cos2a=1 then find the value of sin2a +sin4a

Answer 1

Answer:

$\text{The value of }\sin^2a+\sin^4a \text{ is 1}$

Step-by-step explanation:

Given

$\cos a +\cos^2a=1$

we have to find the value of $\sin^2a+\sin^4a$

As, $\sin^2a+\cos^2a=1$

Given $\cos a+\cos^2a=1$

⇒ $\cos a=1-\cos^2a=\sin^2a$

$\sin^2a+\sin^4a$

Put the value of $sin^2a$

= $\cos a+\cos^2a$

=$1$

Answer 2

Answer:

the value of Sin2 a + sin4 a is 1 .

Step-by-step explanation:

cos a + cos2 a=1

we have to find the value of Sin2 a + sin4 a

as Sin2 a + cos2 a =1

given,

cos a + cos2 a=1

=cos2 a=1- cos2 a=Sin2 a

Sin2 a+ sin4 a

put the value of Sin2 a

=cos a+cos2 a

=1

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