Question

if costheta - sintheta =0, then sin^4theta + cos^4 theta =? please very urgent​

Answer 1

Step-by-step explanation:

give

cosθ - sinθ = 0

sinθ = cosθ

sinθ/cosθ = 1

tanθ = 1

θ = 45°

now

sin⁴θ + cos⁴θ

sin⁴45° + cos⁴45°

(1/√2)⁴ + (1/√2)⁴

1/4 + 1/4

= 1/2

Answer 2

Answer:

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