Solve 5^2=16+36-2*4*6*cos143

$$5 ^ { 2 } = 16 + 36 - 2 \cdot 4 \cdot 6 \cdot \cos 143$$

Verify

Solution Steps

Evaluate trigonometric functions in the problem

$$5 ^ {2} = 16 + 36 - 2 \cdot 4 \cdot 6 \cdot -0.7986355100472929$$

Calculate 5 to the power of 2 and get 25.

$$25=16+36-2\times 4\times 6\left(-0.7986355100472929\right)$$

Add 16 and 36 to get 52.

$$25=52-2\times 4\times 6\left(-0.7986355100472929\right)$$

Multiply 2 and 4 to get 8.

$$25=52-8\times 6\left(-0.7986355100472929\right)$$

Multiply 8 and 6 to get 48.

$$25=52-48\left(-0.7986355100472929\right)$$

Multiply 48 and -0.7986355100472929 to get -38.3345044822700592.

$$25=52-\left(-38.3345044822700592\right)$$

The opposite of -38.3345044822700592 is 38.3345044822700592.

$$25=52+38.3345044822700592$$

Add 52 and 38.3345044822700592 to get 90.3345044822700592.

$$25=90.3345044822700592$$

Compare 25 and 90.3345044822700592.

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