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alpha, beta, gamma, delta are angles in ...

`alpha, beta, gamma, delta` are 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.
If `alpha+beta+gamma+delta=theta` and `alpha=70^(@)`

A

`400^(@) lt theta lt 580^(@)`

B

`470^(@) lt theta lt 650^(@)`

C

`680^(@) lt theta lt 860^(@)`

D

`540^(@) lt theta lt 900^(@)`

Text Solution

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The correct Answer is:
C
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