Question

4 sin2 60° +3 tan2 30 8 sin 30° cos 45°​

Answer 1

Answer:

Step-by-step explanation:

Given

4sin²60° + 3tan²30° - 8sin45° . cos45°

4 . ( √3 / 2 )² + 3 ( 1 /√3 )² - 8 ( 1 /√2 ) . ( 1 /√2 )

= 4 × 3 / 4 + 3 × 1 / 3 - 8 × 1 / 2

= 3 + 1 - 4

= 3 - 3

= 0

Answer 2

= 4(√3/2)²+3(1/√3)²-8(1/2)(1/√2)

= 4×3/4+3×1/3-8×1/2×1/√2

= 3+1-4×1/√2

= 4-4/√2

=4√2-4/√2

=