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"cosec"(270^(@)-A)+"cosec"(90^(@)-A)+sec...

`"cosec"(270^(@)-A)+"cosec"(90^(@)-A)+sec(90^(@)-A)+sec(270^(@)-A)=`

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Prove that: "cosec"(270^(@)-A)"cosec"(270^(@)+A)+cot(270^(@)-A)cot(270^(@)+A)=1

Prove that: "cosec"(270^(@)-A)"cosec"(270^(@)+A)+cot(270^(@)-A)cot(270^(@)+A)=1

"cosec" 15^(@) + sec 15^(@) =

Simplify : ("sec"(270^@ - A) "sec"(90^@ - A) - tan (270^@ -A) tan (90^@ + A))/(cot A + tan (180^@ + A) + tan (90^@ + A) + tan (360^@ - A) + cos 180^@)

Prove: (iii) "sec" (270^(@) - theta) "sec" (90^(@)- theta) - tan (270^@ - theta) tan (90^(@) + theta) = -1

csc(360^(@))/(7)+csc(540^(@))/(7)=csc(180^(@))/(7) (b) csc(90^(@))/(7)sec(180^(@))/(7)(d)sec(90^(@))/(7)