Pythagorean Theorem, Special Right Triangles and Trigonometry

Which of the following angles represent the given triangle?

• 45º-45º-180º

• 45º-45º-90º

• 30º-60º-90º

• 30º-45º-90º

If the hypotenuse measures 213 cm while the upper angle is 50° and the opposite side is missing, the ratio of what trigonometric function can be used?

• Cosine

• Sine

• Cosecant

• Secant

Select the trigonometric functions that can be used in solving the value of d.

• cotangent

• sine

• tangent

• cosecant

Which of the following does not belong to the trigonometric functions of an obtuse angle?

• sin θ = sin (180º + θ)

• cos θ = -cos (180º - θ)

• cot θ = -cot (180º - θ)

• csc θ = csc (180º - θ)

In triangle CDB, which of the following is the value of angle B?

• 45°

• 60°

• 30°

• 90°

Find the value of x.

Which of the following is the value of tan 142º43' in functions of obtuse angles?

• 0.7163

• -0.7163

• 0.7613

• -0.7613

The value of cosine in trigonometric functions of obtuse angles can be identified using the formula cosθ = cos (180º -θ)

• TRUE

• FALSE

To easily solve for the composite figures of right triangles, what is the first step to do?

• illustrate

• write the given

• separate the triangles

• none of the above

In the rules of trigonometric functions of an obtuse angles, which of the following reflects a positive function?

• cotangent

• sine

• cosine

• cosecant