The value of (sin2 30°. cos2 45°) + (5 tan2 30°) + \(\frac{3}{2}\)sin2 90° - 3cos2 90°:
Answer & explanation
Correct answer: option 2
(sin2 30° . cos2 45°) + (5tan2 30°) + \(\frac{3}{2}\)sin2 90° - 3cos2 90°
= (\(\frac{1}{4}\) . \(\frac{1}{2}\)) + 5(\(\frac{1}{\sqrt {3 }}\))2 + \(\frac{3}{2}\)(1)2 - 3(0)
= \(\frac{1}{8}\) + \(\frac{5}{3}\) + \(\frac{3}{2}\)
= \(\frac{3 + 40 + 36}{24}\)
= \(\frac{79}{24}\)
= 3\(\frac{7}{24}\)