October 2018 1 90 Report
Matematika kales 10 SMK
Diketahui t A = √5/2 dan tanB = 4/3 dengan A dan B sudut lancip. Nilai dari cos (A+B) adalah
A. 2/15(3-2√5)
B. 2/15(3-√5)
C. 2/15(5-2√3)
D. 2/15(3+√5)
E. 2/15(5+√3)
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