Find the exact value under the given conditions
sin a = 20/29, 0 < a < π/2;
cosβ=12/13, 0 < β
find cos(a+β)
+14903 Find the exact value under the given conditions
sin a = 20/29, 0 < a < π/2;
cosβ=12/13, 0 < β
find cos(a+β)
Hello Guest!
\(cos(\alpha+\beta)=cos(arcsin(\frac{20}{29})+arccos(\frac{12}{13}))\)
\(cos(\alpha+\beta)=cos(0.761+0.3948)\)
\(cos(\alpha+\beta)=cos(1.1558)\)
\(cos(\alpha+\beta)=0.403183\)
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