Question

Both 2 and 3 ............ If u answer correctly I will mark as brainlist...............​

Answer 1

Q-2:

At x = 15°

4cos(2x).sin(4x).tan(3x) - 1

= 4cos(2×15).sin(4×15).tan(3×15) - 1

= 4cos(30).sin(60).tan(45) - 1

= 4×(√3/2)×(√3/2)×(1) - 1

= 3 - 1

= 2

Q-3:

At x = 20°

12sin(3x/2).cos(3x) + 5tan(2x+5) - 3cot^2(3x)

= 12sin(3×20/2).cos(3×20) + 5tan(2×20+5) - 3cot^2(3×20)

= 12sin(30).cos(60) + 5tan(45) - 3cot^2(60)

= 12×(1/2)×(1/2) + 5(1) - 3(1/√3)^2

= 3 + 5 - 3(1/3)

= 3 + 5 - 1

= 7

Please mark it as Brainliest!