Evaluate the exact numerical expression: sin^2(25 deg) + cos^2(25 deg) + tan(45 deg).
Answer and explanation
Correct answer: B. 2
- Step 1: By Pythagorean identity, sin^2(25 deg) + cos^2(25 deg) = 1. Step 2. tan(45 deg) = 1. Step 3. Sum = 1 + 1 = 2. Answer: 2. Why not the others: 1 omits tan(45 deg).
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