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7. Values of Trigonometric Functions at Sum of Difference of Angles
Home · Class 11 · · Ref. Book · 7. Values of Trigonometric Functions at Sum of Difference of Angles
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Q25 of 90 Page 7

If then prove that .

Given


We know that







Hence, proved.


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23

If tanA + tanB =A And CotA + CotB =B, prove that: cot(A +B) = 1/a – 1/b.

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If sin(α + β) = 1 And sin(α – β) = 1/2, where , then find the values of tan(α + 2β) And tan(2α + β).

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If α,β are two different values of x lying between 0 And 2π which satisfy the equation 6 cos x + 8 sin x = 9, find the value of Sin(α+β).

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7. Values of Trigonometric Functions at Sum of Difference of Angles
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