Trig ! (2 Viewers)

[SGSII]

Heys

Can you please help me:



Please provide steps

Thank you.

 

[deswa1]

For 1) Note that tan(2x)=(2tanx)/(1-tan^2x)

Your question fits this exactly -> (2tan(10))/(1-tan^2(10))=tan(2(10))=tan20

Sorry about the lack of latex - don't have time now.

 

[SGSII]

For 1) Note that tan(2x)=(2tanx)/(1-tan^2x)

Your question fits this exactly -> (2tan(10))/(1-tan^2(10))=tan(2(10))=tan20

Sorry about the lack of latex - don't have time now.

Okays thanks

 

[SGSII]

But how would i do the next question ?

 

[Fus Ro Dah]

But how would i do the next question ?

It's the exact same thing, except they used the Weierstrass Substitution formula for the cosine function, instead of the tangent function, as deswa1 did above.

 

[SGSII]

It's the exact same thing, except they used the Weierstrass Substitution formula for the cosine function, instead of the tangent function, as deswa1 did above.

Okays Thanks !