सिद्ध कीजिए की:
` cot ( 270^(@) -A) =tan A `

cot(270^@-theta)=

सिद्ध कीजिए कि |vecA xx vecB|^(2) + |vecA * vecB|^(2) = (AB)^(2).

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^@)

सिद्ध कीजिए कि 2tan^(-1)sqrt((b)/(a))=cos^(-1)((a-b)/(a+b))

Prove the following identities : (cot A)/(1 - tan A) + (tan A)/(1- cot A) = 1 + tan A + cot A

(tan A) / (1-cot A) + (cot A) / (1-tan A) = 1 + tan A + cot A = 1 + sec A cos ecA

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

Prove that : (cot A + tan B)/ (cot B + tan A) = cot A tan B

Show that (cot A + tan B) / (cot B + tan A) = cot A. tan B.