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katrin2010 [14]
4 years ago
10

Evaluate 15cos60 Options are A) -0.5 B)7.5 C)-14.5

Mathematics
2 answers:
USPshnik [31]4 years ago
6 0

\cos60^o=\dfrac{1}{2}\\\\\text{Therefore}\\\\15\cos60^o=15\cdot\dfrac{1}{2}=7.5\\\\Answer:\ \boxed{B)\ 7.5}

Setler79 [48]4 years ago
3 0

Answer:

The correct option is B.

Step-by-step explanation:

The given expression is

15\cos (60^{\circ})

We already know that

\cos (60^{\circ})=\frac{1}{2}

Put this value in the given expression.

15\cos (60^{\circ})=15\times \frac{1}{2}

15\cos (60^{\circ})=\frac{15}{2}

15\cos (60^{\circ})=7.5

The value of given expression is 7.5. Therefore the correct option is B.

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