Multiple Choice Question (MCQ)

1-2\sin^2 \theta -2\cos^2 \theta=

  1. ×

    -2

  2. ✓

    -1

  3. ×

    0

  4. ×

    1

  5. ×

    2

Collected in the board: Trigonometry

Steven Zheng posted 2 months ago


Answer

  1. 1-2\sin^2 \theta -2\cos^2 \theta=1-2(\sin^2 \theta +\cos^2 \theta)=1-2=-1

Steven Zheng posted 2 months ago

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