sin 70 con 20 cose 20- sec 70 - -2008 70 cosec 200

Prove that : (i) (sin 70^@)/(cos 20^@)+(cosec 20^@)/(sec 70^@)-2cos 70^@cosec 20^@=0 (ii) (cos 80^@)/(sin 10^@)+cos 59^@cosec 31^@=2 (iii) (2 sin 68^@)/(cos 22^@)-(2 cot 15^@)/(5 tan 75^@)-(3tan 45^@tan 20^@tan 40^@tan 50^@tan 70^@)/(5)=1 (iv) (sin 18^@)/(cos 72^@)+sqrt(3) (tan 10^@ tan 30^@tan 40^@tan 50^@tan 80^@)=2 (v) (7cos 55^@)/(3 sin 35^@)-(4(cos 70^@cosec 20^@))/(3(tan 5^@tan 25^@tan 45^@tan 65^@tan 856^@))=1

Prove that: (sin70o)/(cos20o)+(cos ec20o)/(sec70o)-2cos700cos ec20o=0

sec 70^@.sin 20^@ - cos70^@.cosec 20^@

Prove that: (sin70^@)/(cos20^@)+(cos e c\ 20^@)/(sec70^@)-2cos70^@\ cos e c\ 20^@=0

Prove that : sec (70^(@) - 0) = cosec (20^(@) + 0)

The value of sin20^@ cos70^@+ sin70^@ cos20^@ is: sin20^@ cos70^@+ sin70^@ cos20^@ का मान क्या होगा ?

Find sin 20^@ -cos 70^@ .

Without using trigonometric tables, prove that : (i) sin 43^@cos47^@+cos43^@ sin 47^@=1 (ii) cos 38^@cos 52^@-sin 52^@=0 (iii) sec 50^@sin40^@+cos40^@cosec 50^@=2 (iv) sec 70 ^@sin 20^@-cos 20^@-cosec 70^@=0

(sin70^(@))/(cos20^(@))+(csc20^(@))/(sec70^(@))-2cos70^(@)csc20^(@)=0

The value of (1 + sec 20^@ + cot 70^@ ) ( 1- cosec 20^@ + tan 70^@) is :