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. Without using trigonometric tables, evaluatec\frac{\cos ^{2} 20^{\circ}+\cos ^{2} 70^{\circ}}{\sec ^{2} 50^{\circ}-\cot ^{2} 40^{\circ}} \times 2 \sec ^{2} 60^{\circ} |
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Answer» bhai clear samajh mein nhi a rha hai |
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