दिखाइए की : ` tan (60^(@) +A ) tan (60^(@) -A) =( 2cos 2A + 1)/( 2cos 2A -1)`

Prove that : tan (60^@+A) tan (60^@-A)= (2 cos 2A+1) / (2 cos 2A-1) .

Prove that tan (60^(@)-theta) tan (60^(@)+theta)=(2cos 2theta+1)/(2 cos 2 theta-1)

Show that: tan(60^(@)+theta)tan(60^(@)-theta)=(2cos2 theta+1)/(2cos2 theta-1)

2tan ^ (- 1) (cos x) = tan ^ (- 1) (2cos ecx)

sin^(2) 60^(@) + 2 tan 45^(@) - cos^(2) 30^(@)

(1+tan^(2)60^(@))^(2)=

(2tan60^(@))/(1+tan^(2)60^(@)) is equal to :

Prove that : (i) ((tan 60^(@)+1)/(tan 60^(@) - 1))^(2) = (1 + cos 30^(@))/(1 - cos 30^(@)) (ii) 3 "cosec"^(2) 60^(@) - 2 cot^(2) 30^(@) + sec^(2) 45^(@) = 0

The value of sin^(2) 60^(@) + 2 tan 45^(@) - cos^(2) 30^(@) is :

((tan60^(@)+1)/(tan60^(@)-1))^(2)=(1+cos30^(@))/(1-cos30^(@))