If tan θ = cot θ and 0° ≤ θ ≤ 90°, state the value of θ.
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If sin x = cos x and x is acute, state the value of x.
If sec A = cosec A and 0° ≤ A ≤ 90°, state the value of A.
If sin x = cos y; write the relation between x and y, if both the angles x and y are acute.
If sin x = cos y, then x + y = 45°; write true or false.