Question

tan 28°=
cos 17°- sin 17÷
cos 17° + sin 17​

Answer 1

Answer:

Step-by-step explanation:

We have

           tan thita =cos17-sin17/cos1717+sin17

                          =1-tan17/1+tan17

        ⇒tan thita =tan(45-17)

        ⇒tan thita =tan28

        ⇒       thita=28