Question

4[sin^4(60°)+cos^4(30°)]-3[tan^2(60°)-tan^2(45°)]+5cos^2(45°) evaluate​

Answer 1

Step-by-step explanation:

4x (√3 /2)^4 + (√3/2)^4- 3x((√3)^2 -(1)^2 )+ 5x(1/√2) ^2

4x 9/16 + 9 / 16 - 3x (3- 1 )+ 5 x 1/2

= 36/16 + 9/16 - 3x2 + 5 x 1/2

= 45/16 - 6 + 5/2

= 45/16 - 12+5 / 2

= 45/16 - 7 / 2

= 45- 56 /16

= -11/16