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Without using trigonometric tables , eva...

Without using trigonometric tables , evaluate the following :
`(cot(90^(@)-theta)*sin(90^(@)-theta))/(sintheta)+(cot40^(@))/(tan50^(@))-(cos^(2)20+cos^(2)70^(@))`

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AI Generated Solution

To evaluate the expression \[ \frac{\cot(90^\circ - \theta) \cdot \sin(90^\circ - \theta)}{\sin \theta} + \frac{\cot 40^\circ}{\tan 50^\circ} - (\cos^2 20^\circ + \cos^2 70^\circ) \] we will use some trigonometric identities. Let's break it down step by step. ...
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