1.

If Sin θ - Cos θ = 0, then what is the value of the expression: (Sin^4(θ) + Cos^4(θ))

Answer»

Step-by-step EXPLANATION:

SINCE, SIN θ - COS θ = 0

Therefore, Sin θ = Cos θ...... (1)

{ \sin}^{4} θ \:  +  { \cos}^{4} θ  \\  =  { \sin}^{4} θ  +  { \sin}^{4} θ  \\  = 2  \: { \sin}^{4} θ  \:  \\ or \:  \\ 2 { \cos}^{4} θ



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