Thread: Please find exact value without calculator

Please explain how to find exact value without the calculator

sec ( tan^-1 5)

Thank you

Hello,

Originally Posted by oceanmd

Please explain how to find exact value without the calculator

sec ( tan^-1 5)

Thank you

Recall that

So

Now you have to see in which quadrant is in order to get the sign of

Looks good to you ?

Originally Posted by oceanmd

Please explain how to find exact value without the calculator

sec ( tan^-1 5)

Thank you

Draw a triangle...



Then use the pythagorean theorem to find the unkown sides.

Then use the definiton of Sec to find the wanted ratio.

TheEmptySet,

Thank you very much.