Trigonometric Ratios
Practice Active
Find a possible solution to the equation cos(x+2) = sin(3x).
A. x = 0.50
B. x = 1°
C. X= 22°
D. X= 449
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C. x=22°

Step-by-step explanation:

Since the principles of sine and cosine are based upon right triangles, the two angles have to be complementary, adding up to 90. Thereby, in your equation, (x+2) + (3x) = 90. Combining like terms gives you:

4x + 2  =  90     subtract 2 from both sides

     - 2      -2

4x  =  88        divide both sides by 4

4         4

x   =  22      

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