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  5. Introduction to Trigonometry

10th Class Mathematics Introduction to Trigonometry Question Bank Trigonometry

  • question_answer
    Which one of the following statements is true?

    A) \[\cos (A+B)=cosA+\operatorname{cosB}\]

    B) \[\cos (A+B)=cosA\operatorname{cosB}\]

    C) \[\cos (A+B)=cosA\operatorname{cosB}-\sin A\sin B\]

    D) \[\cos (A+B)=cosA\operatorname{cosB}+\sin A\sin B\]

    Correct Answer: C

    Solution :

    Not available


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