- A±√
- B±√
- C±(a + b − c)
- D±√
Step-by-Step Solution
Square and add the two expressions: , because the cross terms ·sinθ·cosθ cancel. So , giving ±√.
Answer: A) ±√
If a·cosθ − b·sinθ = c, then a·sinθ + b·cosθ equals:
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