If tan θ = 1, what is the value of (sin θ + cos θ)?
Correct: A
If tan θ = 1, then θ must be 45° (since tan 45° = 1). Now substitute θ = 45° into the expression (sin θ + cos θ). We know sin 45° = 1/√2 and cos 45° = 1/√2. So, sin 45° + cos 45° = 1/√2 + 1/√2 = 2/√2. This simplifies to √2 (by multiplying numerator and denominator by √2: (2√2)/(√2 * √2) = 2√2/2 = √2).