If `1+sin^2A=3sinAcosA`, then find the values of cotA

If sin A + sin^2 A + sin^3 A = 1 , then find the value of cos^6 A-4 cos^4 A + 8 cos^2 A .

If 15 cotA = 8 , then find the value of cosec A .

If sec A= 2, then find the value of (1)/(cotA)+(cosA)/(1+sinA)

If cosA=7/(25) , find the value of tanA+cotA .

If A+B=225^(@) , then find the value of (cotA)/(1+cotA)xx(cot B)/(1+cotB)

If A lies in the second quadrant and 3tanA + 4=0 , then find the value of 2cotA-5cosA+ sinA .

If sin^-1 x+sin^-1 y+sin^-1 z=(3pi)/2 , then find the value of x^2+y^2+z^2

If sin^-1 x+sin^-1 y+sin^-1 z=(3pi)/2 , then find the value of x^2+y^2+z^2

If sin theta = cos theta find the value of : 3 tan ^(2) theta+ 2 sin ^(2) theta -1

If sin theta_1 + sintheta_2 + sin theta_3 = 3 then find the value of cos theta_1 + cos theta_2 + cos theta_3.