If A + B + C= `180^@`, prove that`(cot A+cotB)/(tanA+tanB)+(cotB+cotC)/(tanB+tanC)+(cotC+cotA)/(tanC+tanA)=1`

If (tanA-tanB)=x and (cotB-cotA)=y ,then cot(A-B)

In a ∆ ABC prove that sec^2 (B+C)/2 -1=cot^2 A/2 .

If tanA=cotB,prove that A+B=90^@

ABC is a right angle triangle where angleC=90° . If AB=30 cm, BC =18 cm then find (a) sinA, (b) secA, (c) cos B (d) cosec B, (e)cotB,(f) tanA

Fill in the gap If tanA=cotB ,where A and B are two acute angles then A+B is.....

Prove the following identities,where the angles involves are acute angles for which the expressions are defined:(ix) (CosecA-SinA)(SecA-CosA)=1/(tanA+cotA)

Choose the correct option.Justify your choice:(iii) (secA+tanA)(1-sinA) = a)secA b)sinA c)cosecA d)cosA