SOLUTION: Sin 75°+cos 75°

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Question 1042402: Sin 75°+cos 75°
Found 2 solutions by addingup, ikleyn:
Answer by addingup(3677)   (Show Source): You can put this solution on YOUR website!
sin(75)+cos(75) = 0.259+0.966 = 1.225
Answer by ikleyn(52866)   (Show Source): You can put this solution on YOUR website!
.
Sin 75°+cos 75°
~~~~~~~~~~~~~~ 

   sin(75°) + cos(75°) =     (use cos(75°) = sin(90°-75°) = sin(15°) )

 = sin(75°) + sin(15°) =     ( use the formula sin(a) + sin(b) = 2*sin()*cos() )

 = 2*sin(45°)*cos(30°) = 2** = .

Regarding the trigonometry formula, see the lessons
    - FORMULAS FOR TRIGONOMETRIC FUNCTIONS
in this site.


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