Question

sin^2 45° + tan^2 30° - sin°2 30°​

Answer 1

sin²45=1/2
tan²30= 1/3
sin60= root3/2

now simply add and subtract ..
1/2+1/3-root3/2
3+2-3root3/6
answer is 5-3root 3/6

Answer 2

$\pink{hello}$

$\pink{here \: ur \: ans}$

=> sin ^2 45°+ tan^2 30° - sin^2 30°.

=> (1/√2)^2 + (1/√3)^2 - ( 1/2)^2.

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

=> (6+ 4 - 3)/ 12.

=> 7/12.