Question

Please evaluate the following questions without using trigonometric values. ​

Answer 1

Answer is (2√3-1) /√3

Explanation:

we know cos 58=sin 32 by cosx=sin(90-x)

similarly sin 22=cos 68

cos 38 = sin 52

tan 18=cot 72

tan35=cot 55

and tan 72.cot72 =1 tanx.cotx=1

and at last put the value of tan 60 and solve

2-1/(tan 60 )