(5) If (tan A+1)(tan A-1)=0 then find the value of A.
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Step-by-step explanation:
tanA−1)(cosec3A−1)=0
(tanA−1)=0;(cosec3A−1)=0
tanA=1;cosec3A=1
tanA=tan45
o
;cosec3A=cosec90
o
A=45
o
;A=30
o
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