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Question: What is the angle made by 3\(\widehat{i}\)+ 4\(\widehat{j}\) with x-axis ?...

What is the angle made by 3i^\widehat{i}+ 4j^\widehat{j} with x-axis ?

A

(a) 0°

A

(b) 180°

A

(c) tan⁻¹ (3)

A

(d) tan⁻¹(\frac{4}{3})

Explanation

Solution

(d)

tan b =43\frac{4}{3}, b = tan–1(43)\left( \frac{4}{3} \right)