Q. 133.9( 10 Votes )

# If sin θ - cos θ = 0, then the value of (sin^{4} θ +cos^{4}θ) is

A. 1

B.

C.

D.

Answer :

Given: sin θ – cos θ = 0

And we know, tan 45° = 1

So, tan θ = 1 = tan 45°

By comparing above equation, we get θ = 45°

Thus,

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