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not only sine, even cosine can be used to represent waveforms. the other trigonometric ratios cannot be used ,as at some points, their numerical value rises to infinity which is impossible for any normal wave with finite energy and amplitude. for example, tangent at any odd no. multiples of 900 becomes infinity.

so do all the other trigonometric ratios. only sine and cosine are bounded functions whose values lie between -1 and 1 for any angle this is similar to the behavior of any ordinary wave. so, they are used.

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11y ago

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