Question

2 cos²45°+2 tan² 60°​

Answer 1

2(cos2 45° + tan2 60°) – 6(sin2 45° – tan2 30°) = 2 × 7/2 – 6 × 1/6 = 7 – 1 = 6 Thus, 2(cos2 45° + tan2 60°) – 6(sin2 45° – tan2 30°) = 6