[" h.I."cos9^(@)-sin8],[" 1."tan A=(5)/(6)" str "tan8-(1)/(11)" ,it fres there for "],[A+B=45^(@)" ."]

If tan A=5/6, tan B=1/11," show that A+B=45"^(@) .

sin[2tan^(-1)(5/8)]

Prove that : cos^(-1).(4)/(5)+ tan ^(-1).(3)/(5) = tan^(-1) .(27)/(11) (ii) Prove that : sin^(-1).(3)/(5)+ tan ^(-1).(3)/(5) = tan^(-1) .(27)/(11)

(cos A) / (1 + -sin A) = tan (45 ^ (@) + - (A) / (2))

"Tan"^(-1)5/6+1/2"Tan"^(-1)11/60=

(cos8^(@)+sin8^(@))/(cos8^(@)-sin8^(@))=tan53^(@)

cos(cos^(-1)cos((8 pi)/(7))+tan^(-1)tan(8(pi)/(7))) has the value equal to -

If tan A=(1-cos B)/(sin B), then tan2A=tan B

Prove that (cos A )/( 1 - sin A ) = tan (45 ^(@) + (A)/(2)),