Trigonometric Ratios of Acute Angles

In a right triangle ABC, where AB = 3 cm, BC = 4 cm, and AC = 5 cm, find sin C.

• 0.8

• 0.6

• 0.4

• 1.0

In triangle ABC, calculate cos A.

• cos A = (a^2 + c^2 - b^2) / (2ac)

• cos A = (b^2 + a^2 - c^2) / (2ba)

• cos A = (a^2 + b^2 - c^2) / (2ab)

• cos A = (b^2 + c^2 - a^2) / (2bc)

What is tan A in triangle ABC?

• tan A = opposite/adjacent

• tan A = opposite - adjacent

• tan A = adjacent/opposite

• tan A = opposite + adjacent

If sin C = 0.6, what is cos C?

• 0.8

• 0.5

• 0.9

• 1.0

Given that tan 25° = 0.42, find cos 65°.

• 0.500

• 0.250

• 0.600

• 0.384

Calculate sin A in triangle ABC.

• sin A = a / c

• sin A = c / a

• sin A = a / b

• sin A = b / c

What is the value of cos C?

• 0

• -1

• undefined

• 1

If tan A = 0.75, what is sin A?

• 0.5

• 0.6

• 0.8

• 0.4

Find the value of sin B in triangle ABC.

• sin B = a * sin(A) / b

• sin B = b / a

• sin B = b * sin(A) / a

• sin B = a / b

If cos 30° = √3/2, what is sin 30°?

• √2/2

• 1/2

• √3/2

• 1