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If cosec 4 theta=sec (60^@-2 theta), the...

If `cosec 4 theta=sec (60^@-2 theta)`, then `theta` is equal to :
यदि `cosec 4 theta=sec (60^@-2 theta)` है, तो `theta` का मान किसके बराबर होगा ?

A

a)`18^@`

B

b)`25^@`

C

c)`15^@`

D

d)`20^@`

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