Trigonometric Functions and Angle Measures

The video tutorial explains how to solve backwards problems in trigonometry by finding angles from given trigonometric ratios. It covers the use of inverse trigonometric functions for cosine, sine, and tangent to calculate angles. The process involves using a calculator's second function key to find the inverse function, inputting the given ratio, and rounding the result to the nearest whole number. The tutorial provides step-by-step examples for each trigonometric function, helping learners understand the method of working backwards to determine angle measures.

What is the angle measure when the cosine ratio is 0.3420?

• 80 degrees

• 70 degrees

• 90 degrees

• 60 degrees

Which function key is used to find the inverse cosine on a calculator?

• First function key

• Fourth function key

• Third function key

• Second function key

What is the angle measure when the sine ratio is 0.5150?

• 35 degrees

• 29 degrees

• 33 degrees

• 31 degrees

How do you round the angle measure of 30.99 degrees?

• 30 degrees

• 31 degrees

• 32 degrees

• 33 degrees

What is the angle measure when the tangent ratio is 0.7536?

• 38 degrees

• 37 degrees

• 35 degrees

• 36 degrees

Which trigonometric function is used to find an angle with a ratio of 0.7536?

• Sine

• Cosine

• Tangent

• Secant