if sin a + sin b =c cosa + cosb=d then cos(a+b) is

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Nishant Vora · Answer

sin a + sin b =c&hellip;.&hellip;.(1) cosa + cosb=d&hellip;.&hellip;..(2) Cos(A+B) = CosACosB - SinASinB Square and add equation (1) and (2) 2 + 2 sina sinb + 2 cosa cosb = c 2 + d 2 2 + 2 cos (a+b) = c 2 + d 2 From here find out cos(a+b) = ?

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if sin a + sin b =c cosa + cosb=d then cos(a+b) is

if sin a + sin b =c cosa + cosb=d then cos(a+b) is

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if sin a + sin b =c cosa + cosb=d then cos(a+b) is

if sin a + sin b =c cosa + cosb=d then cos(a+b) is

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