Question

If cos (α +β) = 0 and β = 30 degrees

then find the value of sin (α – β)

Answer 1

Answer:

Sin(α-β)= Root3/2

Step-by-step explanation:

Cos(α+β)=0

since cos90=0

therefore α+β=90

⇒ α+30=90  (since = 30° given)

⇒ α=60°

Therefore Sin (α-β)⇒ Sin30°

since Sin30°=root3/2

therefore Sin(α-β)=root3/2

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Answer 2

Answer:

cos alpha or sin beta.....any of these answers is correct