Solve 4.25=4.25*cos(17^circ)+2.9*cos(69^circ)

$$4.25=4.25 \times \cos ( 17 ^ { \circ } ) +2.9 \times \cos ( 69 ^ { \circ } )$$

Verify

Solution Steps

Evaluate trigonometric functions in the problem

$$4.25 = 4.25 \cdot 0.9563047559630354 + 2.9 \cdot 0.3583679495453004$$

Multiply 4.25 and 0.9563047559630354 to get 4.06429521284290045.

$$4.25=4.06429521284290045+2.9\times 0.3583679495453004$$

Multiply 2.9 and 0.3583679495453004 to get 1.03926705368137116.

$$4.25=4.06429521284290045+1.03926705368137116$$

Add 4.06429521284290045 and 1.03926705368137116 to get 5.10356226652427161.

$$4.25=5.10356226652427161$$

Compare 4.25 and 5.10356226652427161.

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