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The points A(0, 0), B(cos alpha, sin alp...

The points `A(0, 0), B(cos alpha, sin alpha) and C(cos beta, sin beta)` are the vertices of a right angled triangle if :

A

`sin((alpha-beta)/(2))=(1)/(sqrt(2))`

B

`cos((alpha-beta)/(2))=-(1)/(sqrt(2))`

C

`cos((alpha-beta)/(2))=(1)/(sqrt(2))`

D

`sin((alpha-beta)/(2))=-(1)/(sqrt(2))`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
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