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cosec(-210^(@))...

cosec(-210^(@))

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

(a)Find the exact value of (sin 300^@tan 330^@ sec (-420^@) )/(cot 135^@ cos 210^@ cosec 315^@ )

The value of "cosec"10^(@)+"cosec"50^(@)-"cosec"70^(@) is _____

The value of of cosec 10^(@) + cosec 50^(@) -cosec 70^(@) is "_______"

The exact value of "cosec"10^(@)+"cosec"50^(@)-"cosec"70^(@) is :

Find the exact value of cosec"10"^(@)+"cosec"50^(@)-"cosec"70^(@)

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