question no. 30........trignometry 11th
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answer 2 ..
because sin^2theeta =1^2=1
cosec^2 theeta=1^2=1
so
1+1=2
because sin^2theeta =1^2=1
cosec^2 theeta=1^2=1
so
1+1=2
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sin @ +cosec @=2
Squaring on both sides
sin^2 @+cosec^2 @+2sin @×cosec @ =4
sin^2 @+cosec^2 @+2=4
sin^2 @ +cosec^2 @=2
Option -C
Squaring on both sides
sin^2 @+cosec^2 @+2sin @×cosec @ =4
sin^2 @+cosec^2 @+2=4
sin^2 @ +cosec^2 @=2
Option -C
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