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) About Me  (Show Source):
You can put this solution on YOUR website!
sin(75)+cos(75) = 0.259+0.966 = 1.225

Answer by ikleyn(52857) About Me  (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(%28a%2Bb%29%2F2)*cos(%28a-b%29%2F2) )

 = 2*sin(45°)*cos(30°) = 2*sqrt%282%29%2F2*sqrt%283%29%2F2 = sqrt%286%29%2F2.

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