Q21 of 42 Page 193

If tan (3 x + 30) = 1. Find x.

Now, we have tan (3 x + 30) = 1,


Here (3 x + 30) is an angle.


Let us assume (3x + 30) = θ


∴ Given equation becomes tan θ = 1


∴ θ = 45


But, (3x + 30) = θ


∴ 3x + 30 = 45


= 3x = 15


∴ x = 5


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