9867204259 9867204259

09-05-2021
Social Studies

contestada

If Sin A+ Sin B = x and cos A+cos B = y prove that tan (a-b/2)
= +-√ 4x² - y2/
x² + y2 and tan (a+b/2) =
Y
2

Respuesta :

brafatoom brafatoom

09-05-2021

Answer:

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