Question

if sin a - cos a = 0 then value of expression sin^4 a + cos^4 a is​

Answer 1

Step-by-step explanation:

Solution

From the above equation, we get

cosθ=sinθ

Hence

θ=45

0

Therefore

sin

4

θ+cos

4

θ

=sin

4

45

0

+cos

4

45

0

=2×(

2

1

)

4

=2×

4

1

=

2

1