if tan^2 =1/2 then value of the expression [(cosec^2a-sec^2a)/(cosec^2a+cot^2a)] is equal to:-(a)1/10(b)2/10(c)3/10(d)7/10
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The correct answer is (c)3)10.
ARA11:
no problem.plzz explain or write in your copy and send the pic
Ok
plzz explain
=(1+cot^2a)-(1+tan^2a) /(1+cot^2a)+(1/tan^2a)
=(1+1/tan^2a)-(1+1/2). /(1+1/tan^2a)+ (1/tan^2a)
=(1+2)-(3/2) /(1+2)+(2)
(3-3/2)/5
ok thnx very much
i got it
Okk
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