In triangle abc, cos a= -0.6. find a and tan a

Part 1)

Part 2)

Step-by-step explanation:

we have

The cos(A) is negative, that means that the angle A in the triangle ABC is an obtuse angle and the value of the sin(A) is positive

The angle A lie on the II Quadrant

step 1

Find the measure of angle A

using a calculator

step 2

Find the sin(A)

we know that

substitute the value of cos(A)

step 3

Find tan(A)

we know that

substitute the values

Simplify

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step-by-step explanation:

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