Question

Heya mate all of u i have need ur help for maith so please help me! If cos x+cos a =cos y,sin x+ sin y=sin a then show the tan(x-y/2)=cot a​

Answer 1

Answer:

sis/ bro here is your answer..

Step-by-step explanation:

ANSWER

If cosx+cosy+cosα=0……(i)

sinx+siny+sinα=0……(ii)

then cot(

2

x+y

)=?

Now,

cosx+cosy=−cosα

2cos(

2

x+y

).cos(

2

x−y

)=−cosα……(iii)

sinx+siny=−sinα

2sin(

2

x+y

).cos(

2

x−y

)=−sinα……(iv)

By (iii)÷(iv)

2×sin(

2

x+y

).cos(

2

x−y

)

2×cos(

2

x+y

).cos(

2

x−y

)

=

−sinα

−cosα

⇒cot(

2

x+y

)=cotα

please follow me..

Answer 2

l didn't understood what you said.