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" 14."tan2 theta=tan((2)/(theta))...

" 14."tan2 theta=tan((2)/(theta))

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Solve tan2 theta=tan((2)/(theta))

tan2 theta xx tan theta=1

The expression (tan4 theta+tan2 theta)(1-tan^(2)(3 theta)tan^(2)theta) is identical to

(tan^(2)(2 theta)-tan^(2)theta)/(1-tan^(2)(2 theta)tan^(2)theta) is equal to-

Prove that: tan4 theta=(4tan theta(1-tan^(2)theta))/(1-tan^(2)theta+tan^(4)theta)

If tan theta+(1)/(tan theta)=2, find the value of tan^(2)theta+(1)/(tan^(2)theta)

tan2 theta tan theta=1

Prove that (tan^(2)2theta-tan^(2)theta)/(1-tan^(2)2thetatan^(2)theta)=tan 3 theta tan theta .

Prove that (tan^(2)2theta-tan^(2)theta)/(1-tan^(2)2thetatan^(2)theta)=tan 3 theta tan theta .