It sin x + sin y +sin z =3 and find the value of cos x +cos y +cos z.

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Detailed Solution

⇒ sin x + sin y +sin z = 3
–1 ≤ sin x ≤ 1
⇒ sin x = sin y = sin z = 1
⇒ sin x +sin y + sin z = sin 90°
⇒ x = y = z = 90°
⇒ cos x + cos y + cos z = cos 90° + cos 90° + cos 90°
⇒ 0

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