Question

If a plus b is 225.prove that tan a plus tan b =1-tan a tanb

Answer 1

Step-by-step explanation:

here,

a+b=225

then multiple both sides by tangent

tan(a+b)=tan(225)

= tan( 180+45)

= tan(45)

= 1 ..... (tan45=1)

I hope, this is helpful