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" (iii) "(cos45^(@))/(sec30^(@)+cosec30^...

" (iii) "(cos45^(@))/(sec30^(@)+cosec30^(@))=(1)/(2)

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Simplify cos45^@/(sec30^@+cosec30^@)

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Evaluate the following (i) sin 60^@ cos30^@ + sin 30^@ cos 60^@ (ii) 2tan^2 45^@ + cos^2 30^@ - sin^2 60^@ (iii) (cos45^@)/(sec30^@ + c o s e c 30^@) (iv) (sin30^@ + tan45^@ - c o s e c 60^@ )/(sec30^@ + cos60^@ +cot45^@) (v) (5cos^2 60^@ + 4sec^2 30^@ - tan^2 45^@ )/ (sin^2 30^@ + cos^2 30^@ )