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ICSE Class X Math 2017 Paper

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Question : 4 of 31
Marks: +1, -0
Evaluate without using trigonometric tables,
sin⁡228∘+sin⁡262∘+tan⁡238∘−cot⁡252∘+14sec⁡230∘\sin^2 28^{\circ} + \sin^2 62^{\circ} + \tan^2 38^{\circ} - \cot^2 52^{\circ} + \frac{1}{4} \sec^2 30^{\circ}
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