If `cos9alpha=sinalphaand 9alpha<90^@,` find the value of `tan5alpha.`

If cos9alpha=sinalpha and 9alpha<90^@ then the value of tan 5alpha is

If cos9alpha=sinalpha and 9alpha lt 90^(@) , then the value of tan5alpha is

If cos9alpha=sinalpha and 9alpha lt 90^(@) , then the value of tan5alpha is

If tan theta=(sin alpha- cos alpha)/(sin alpha+cos alpha) , then:

If tan theta=(sin alpha- cos alpha)/(sin alpha+cos alpha) , then

If tan theta=(sin alpha- cos alpha)/(sin alpha+cos alpha) , then:

underset is If tan theta=(sin alpha-cos alpha)/(sin alpha+cos alpha), then sin alpha+cos alpha

What is the inverse of A = ((cos alpha,sin alpha),(sin alpha,-cos alpha))

Prove that cosalpha/(sin3alpha)+(cos3alpha)/(sin9alpha)+(cos9alpha)/(sin27alpha)=1/2[cotalpha-cot27alpha]