Trigonometry Review (3 of 5)

Part 1 (1-13): Convert between degrees and radians, graph angles in standard position, and find coterminal angles in both radians and degrees. Find the exact value (the ratio between the sides) of different special angles (30°-60°-90° and 45°-45°-90°) by evaluating the trigonometric function (sin, cos, tan, csc, sec, cot).

Part 2 (14-20): More evaluating questions continued from part 1. Find the trigonometric ratio given: (1) a point (x, y) on the terminal side of an angle in standard position, (2) a triangle, (3) another trig ratio. All answers are left as exact (simplified radical form).

Part 3 (20b-23): Using trig functions and inverse trig functions to find missing angles or sides in right triangles. Now we're using the calculator and approximating our answers.

Part 4 (24a-c): We leave the comfortable world of right triangles behind and enter a world with no 90° angles and no hypotenuses. So, we must use law of sines and law of cosines to find missing sides and angles and solve triangles. Beware of the SSA situation because it doesn't mean there is only 1 triangle possible; there might be two or it might not even be a triangle.

Part 5 (24d-25): We continue solving triangles with the law of sines and law of cosines. We also find the area of non-right triangles using two different area formulas.

Category:

Education

Tags:

• Trig
• trigonometry
• sine
• cosine
• tangent
• cosecant
• secant
• cotangent
• sin
• cos
• tan
• sec
• csc
• cot
• law
• sines
• cosines
• evaluate
• convert
• radian
• degree
• graph
• standard
• position
• coterminal
• exact
• value
• ratio
• triangle
• side
• angle
• inverse
• function
• algebra
• possible
• ambigous

[davidtutorsmath]

@smithsansoo You're welcome. I did catch the mistake and correct the answer.

[davidtutorsmath]

@drdurrrr You're welcome.

[drdurrrr]

thank you!!!

[smithsansoo]

Great review. Thanks. You inadvertently divided the numerator 4 rather than 40 in your final problem.