The value of tan² 30 – 4 sin² 45 is
(a) 1
(b) 7/3
(c) -5/3
(d) -11/3
Answer:
tan ²30° – 4 sin²45°
(1/√3)² – 4 × (1/√2)²
1/3 – 4 × 1/2
= -5/3
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