Solve cos 30 * sin(-50) / tan 70

amanf 2020-12-24 Answered
Solve cos30sin(50)tan70
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Expert Answer

Derrick
Answered 2020-12-25 Author has 94 answers

sin(50)=sin(50)
so the expression becomes cos(30)sin(50)tan(70)=sin(50)32tan(70)=0.2415 .
[cos(30)=32=0.8660 because in right-angled triangle ABC where B=90, C=30, A=60, the sides are in the ratio 1,3,2 by Pythagoras),
tan(70)=2.7475,sin(50)=0.7660.

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