Question

5cos²60+4sec²30-tan45/sin²30 +cos²30​

Answer 1

$\sf{\dfrac{5 { \cos}^{2} 30 + 4{ \sec}^{2} 30 - 4 { \tan}^{2} 45 }{.{ \sin}^{2} 30 + { \cos}^{2} 30 } }$

→ Cos 60 = 1/2

→ Sec 30 = 2/√3

→ Tan 45 = 1

→ Sin 30 = 1/2

→ Cos 30 = √3/2

→ 5(1/4) + 4(4/3) - 1 / 1/4 + 3/4

→ 5/4 + 16/3 - 1 / 1

→( 15 + 64 - 12 /12) × (1)

→ 67/12