Question

(105°)sec find value​

Answer 1

Answer:

Heya here is your soln ❤️❤️❤️

Hope it helps ❤️ ☺️

Answer 2

Answer:

sec 105  =1/cos 105

cos 105 =cos (60+45)

cos (60+45) = cos 60 cos 45 - sin 60 sin 45

               = 1/2. 1/2$\sqrt{2}$ - 1/2$\sqrt{3}$ . 1/2$\sqrt{2}$

               = 1/4$\sqrt{2}$  -1/4 $\sqrt{6}$

sec 105 = 1/ ( 1/4$\sqrt{2}$  -1/4 $\sqrt{6}$)

            = 4/ ($\sqrt{2}$ - $\sqrt{6}$)

             = 4($\sqrt{2}$ + $\sqrt{6}$) /-4  

       =- ($\sqrt{2}$ + $\sqrt{6}$)

Step-by-step explanation:

cos (a+b) = cos a cos b - sin a sin b