Question

help me please .......................​

Answer 1

let theta =x (for understandable equation)

now given

tanx • tan40 =1

so we can say

tanx•cot60=1 (tan40=cot60)

tanx=1/cot60

tanx=1/1/√3 ( cot60= 1/√3)

tanx=√3

but tan60=√3

hence

x=60 value of theta is 60°

Answer 2

Ans....................