Consider triangle ABC, where angle C is a right angle. Without consulting a calculator, let sin (53°) = 0.7986. Enter the angle measure B, in degrees, for COS (B) = 0.7986

Question

Mathematics

Lutz

16 December, 02:57

Consider triangle ABC, where angle C is a right angle. Without consulting a calculator, let sin (53°) = 0.7986. Enter the angle measure B, in degrees, for COS (B) = 0.7986

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Answers (1)

Know the Answer?

Monique Brandt · Answer 1

We have a right triangle.

Then:

A+B+C=90

dа ta:

C=90º

A=53º

Therefore:

53º+B+90º=180º

B=180º-53º-90º

B=37º

Answer: B=37º

To check:

Cos 37º=0.79863551 ... ≈0.7986