Question

Please answer them.........

Answer 1

Answer:

(i) 11/4

(ii) 7/2

Step-by-step explanation:

i) 4cos²60° + 4sin²45° - sin²30°

= 4(1/2)² + 4(1/√2)² - (1/2)²

= 4 x 1/4 + 4 x 1/2 - 1/4

= 1 + 2 - 1/4

= 11/4

ii) sin²45° - tan²45° + 3( sin²90° + tan²30° )

= (1/√2)² - (1)² + 3( 1² + (1/√3)² )

= 1/2 - 1 + 3( 1 + 1/3 )

= 1/2 - 1 + 3( 4/3 )

= 1/2 - 1 + 4

= 7/2