1.

alpha, beta,gamma, deltaare angles in I, II, III and IV quadrant respectively and no one of them is an integral multiple of pi//2- They form an increasing arithmetic progression. Which of the following does not hold:

Answer»

`SIN(beta + GAMMA) =sin(alpha + beta)`
`sin(beta - gamma)=sin(alpha -delta)`
`tan2(alpha - beta) = TAN(beta - delta)`
`cos(alpha + gamma)=COS2BETA`

ANSWER :B


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