Trigonometry sin cot CAST

5. (a) For the triangle, a=10, b=12, B=60°, labelled by convention, find all the angles and sides.

(b) Solve the following, ????????^2?=1, express your solution in degrees in the range ?180°???180°, and in radians in the range 0°???2?rad. 

If someone could do these and show working out that would be great!

note from me (the cot is squared it just does not show the cot to the power of 2 very well)


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  • looks great. just regarding section b, is there further info required due to the angle range stated? if that makes sense.

  • theta=90 degrees is the only solution to sin theta= 1 in the given range. So there is no further info required.

The answer is accepted.