Question

Write your question here (Keep it simple and clear to get the best answer)cosa - sina=V2sina,prove that
cosa+ sina =V2sina

Answer 1

Step-by-step explanation:

cos a - sin a = V2 sin a

or, cos a = (V2 sin a - sin a) ............. (1)

NOW

cos a + sin a

= V2 sin a - sin a + sin a [FROM (1)]

=V2 sin a

PROVED