Question

If Sin A + Cos A = √2 Sin (90-A), show that Cot A = √2 + 1.

Answer 1

cos A = √2 sin A - sin A 

cos A = (√2 - 1) sin A 

cos A / sin A = √2 - 1 

cot A = √2 - 1 = 1.414 - 1 = 0.414 approx.

Answer 2

Here is the answer...