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What is the value of cos(90^(@)) ?

What is the value of cos⁡(90∘) \cos \left(90^{\circ}\right) ?

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Full solution

Q. What is the value of cos⁡(90∘) \cos \left(90^{\circ}\right) ?
  1. Find cosine at 9090 degrees: We need to find the value of the cosine function at 9090 degrees. The cosine of 9090 degrees is a well-known value in trigonometry.\newlineCalculation: cos⁡(90∘)=0\cos(90^{\circ}) = 0

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