Question

Please its urgent
Please answer his question with detailed explanation

Answer 1

let alpha be 60°

beta be 30°

because

60°+30°=90°

so,

cos^2 alpha + cos^2 beta

putting up the values from trignometry table

we get,

(1/2)^2+(√3/2)^2

1/4+3/4

4/4

1

#D. 1 is the answer