1 Attachment(s)

Trig Problem from my Pre-Calc Homework

Attachment 23776

Let ABC be a triangle with standard notation. Suppose a = 5, b = 6, and C = 26˚. Evaluate the remaining sides and/or angles of the triangle, namely A, B, and c. Perform exact calculations and round only final answers.

Round the answers to four decimal places.

Homework question. My last one for the week. Thanks =)

Re: Trig Problem from my Pre-Calc Homework

start with the **law of cosines** to get side c, then then the **law of sines** to get either angle A or B ... then you can find angle C

Re: Trig Problem from my Pre-Calc Homework

I got c, and plugged the numbers into the law of sin for A:

[sin(A)/5]=[sin(26)/2.6593]

getting the answer: 55.5095

Yet the answer apparently isn't right

Re: Trig Problem from my Pre-Calc Homework

Quote:

Originally Posted by

**jonathanraxa** I got c, and plugged the numbers into the law of sin for A:

[sin(A)/5]=[sin(26)/2.6593]

getting the answer: 55.5095

Yet the answer apparently isn't right

don't round until the very last ... I get angle A = 55.5069