[" If the product (sin "1^(@))(sin5^(@))...

[" If the product (sin "1^(@))(sin5^(@))(sin7^(@))..........(sin89^(@))=(1)/(2^(n))" ,then find the value of "n" ."],[" If "f(theta)=sum_(n=1)^(6)csc(theta+((n-1)pi)/(4))csc(theta+(n pi)/(4))," where "0

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If the product (sin1^(@))(sin3^(@))(sin5^(@))(sin7^(@))......*(sin89^(@))=(1)/(2^(n)) ,then find the value of n.

If the product (sin1^(@))(sin3^(@))(sin5^(@))(sin7^(@))...(sin89^(@))=((1)/(2^(n))) then find the value of n

If the product (sin1^@)(sin3^@)(sin5^@)(sin7^@)...(sin89^@)=(1/2^n) then find the value of n

for 0

sin^(4) theta + 2 sin^(2) theta (1-(1)/("cosec"^(2) theta ) )+ cos^(4) theta =

If f(theta)=sum_(n=1)^(6)cos ec(theta+((n-1)pi)/(4))cos ec(theta+(npi)/(4)) , where 0ltthetalt(pi)/(2) , then find the minimum value of f(theta) .

If sum_(i=1)^(n) cos theta_(i)=n , then the value of sum_(i=1)^(n) sin theta_(i) .