Question

please solve these 3 question..... please please

Answer 1

here the ans of 1st by659968

Answer 2

2). sin^2 30+cos^2 60+tan^2 45

sin30=1/2

cos60= 1/2

tan45= 1

(1/2)^2+(1/2)^2+1^2

1/4+1/4+1

1+1+4/4

6/4

=>3/2