1.

If α cos θ – b sin θ = c, then α sin θ + b cos θ is equal to

A. \(\pm \sqrt{b^2 + c^2 - a^2}\)
B. \(\pm \sqrt{a^2 + b^2 - c^2}\)
C. \(\pm \sqrt{c^2 + a^2 - b^2}\)
D. \(\pm \sqrt{a^2 + b^2 + c^2}\)
Answer» C. \(\pm \sqrt{c^2 + a^2 - b^2}\)


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