2 sin²45°+cosec² 60°-2tan² 30°
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Answer:
2 sin ² 45⁰ + cosec²60⁰ - 2 tan² 30⁰
= 2× 1/√2 ² + 2/√3 ² - 2 × 1/√3²
= 2 × 1/ 2 + 4/ 3 - 2 × 1/ 3
= 1 + 4/3 - 2/3
= 1 + 4-2/3
= 1 + 2/3
= 5/3
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