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(Solved): Use the formule for the cosine of the difference of two angles to find the exact value of the expre ...



Use the formule for the cosine of the difference of two angles to find the exact value of the expression, cos \( \left(\frac{
Use the formule for the cosine of the difference of two angles to find the exact value of the expression, cos Find the exact value of the expression.


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We have,cos?(a?b)=cos?a.cos?b+sin?a.sin?bT
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