Question

If sin A – cos A = 0, then the value of sin4 A + tan4 A is
(a)1/4
(b)3/2
(c)5/4
(d)4/5​

Answer 1

Answer:

and

Step-by-step explanation:

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