Thread: trigonometry (tan and cos)

Hello!

tanx = 5/12, we have to get a cos value, and calculate the angle x.

I was trying this several times but i always get error on the calculator.

thank you for your help.

If tan a = 5/12, then let y = 5u and x = 12u. Then the hypotenuse = . Thus, the cosine is . To calculate the angle, type .