0. Find cosec 30Â° and cos 60Â° geometrically. – InterviewSolution

1.

0. Find cosec 30Â° and cos 60Â° geometrically.

Answer»

Please take a look at the attached diagram, since angle CAB is 30° CA = 2cm and BC = 1cm. By Pythagoras Theorem, we can calculate AB as follows:

CA² = AB² + BC²2² = AB² + 1²Hence AB = √3

Now cos∅ = base ÷ hypotenuse

Therefore cos30° = (√3)/2

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