Question

plzzzz help me. It's very urgent.

Answer 1

9. as sin²a+cos²a is equal to 1 therefore

we have 1/tan²60
or cot²60=1/√3
10. put all the values such as sin 45 as 1/√2 etc and you will get your answer

Answer 2

$<b>Hey there !!$

(1)As we know
sin45° = 1/√2
cos 45°=1/√2
tan60° = √3
=> (1/√2+1/√2)÷√3
=> (2/√2)÷√3
=>√2/√3

Hope it helped you.