NI If cos (a + b) = 0, then sin (a – b) can be reduced to ​

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NI
If cos (a + b) = 0, then sin (a – b) can be reduced to

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Savannah 1 month 2021-09-17T08:00:30+00:00 1 Answer 0 views 0

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    2021-09-17T08:02:12+00:00

    Answer:

    Hey mate ! Check ur answer below.

    Step-by-step explanation:

    From the question, we have cos(a+b)=0

    Then,

    (a+b)=cos⁻¹(0)

    (a+b)=90°

    Then,

    a=(90°-b)

    Now,

    sin(a-b)=sin(90-b-b) (from the above calculation)

    sin(a-b)=sin(90-2b)

    sin(a-b)=cos(2b)

    Therefore sin (a – b) can be reduced to cos(2b).

    Thank me if u got it

    Mark me as the brainliest 🙂

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