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Exact value of given equation cos(5π/6)*cos(π/12)+sin(5π/6)*sin(π/12) is -√2/2
cos(5π/6)*cos(π/12)+sin(5π/6)*sin(π/12)
0.8660*0.9659+0.2588*0.5=-√2/2
The trigonometric functions of an angle in mathematics are sine and cosine. An acute angle's sine and cosine are defined in terms of a right triangle: for the given angle, the sine is the. We'll refer to the ratio of a right triangle's opposing side to hypotenuse as the sine and assign it the symbol sin. The cosine, denoted by the symbol cos, is the proportion of a right triangle's neighboring side to its hypotenuse. The word "sine" in trigonometry is derived from a Sanskrit word that means "chord" through the use of Latin. The AB chord, which is half a chord of the unit circle in the illustration below, has length sin. Complementary angles serve as the basis for the co-functions.
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