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If sec 0 + tan 0 = p, then find the value of cosec 0.
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Answer:
cosec∅ = (p²+1)/(p²-1)
sec∅ + tan∅ = p ....(1)
as we know (sec²∅ - tan²∅= 1))
= (sec∅+tan∅)(sec∅ - tan∅ ) = 1
= p (sec∅ - tan∅ ) = 1
= (sec∅ - tan∅ ) = 1/p ...(2)
now we have 2 equation add them
we get
2sec∅ = (p²+1)/p
sec∅ = (p²+1)/2p. [cos∅ = 1/sec∅]
cos∅ = 2p/(p²+1)
now subtract both the above equations.
we get
2tan∅ = (p²-1)/p
tan∅ = (p²-1)/2p
we know
sin∅ = tan∅.cos∅
sin∅ = (p²-1)/2p x ( 2p/p²+1)
sin∅ = (p²-1)/(p²+1). [cosec∅ = 1/sin∅]
cosec∅ = (p²+1)/(p²-1)
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