**Q) **Evaluate (5/cot^{2} 30^{°}) + (1/ sin^{2} 60^{°}) – cot^{2} 45^{°} + 2 sin^{2} 90^{°}

**Ans: **

Givent that, – cot^{2} 45 + 2 sin^{2} 90

= + – (1)^{2 }+ 2 (1)^{2}

= + – 1^{ }+ 2

= 3 – 1^{ }+ 2

**= 4**

**Q) **Evaluate (5/cot^{2} 30^{°}) + (1/ sin^{2} 60^{°}) – cot^{2} 45^{°} + 2 sin^{2} 90^{°}

**Ans: **

Givent that, – cot^{2} 45 + 2 sin^{2} 90

= + – (1)^{2 }+ 2 (1)^{2}

= + – 1^{ }+ 2

= 3 – 1^{ }+ 2

**= 4**