Practicing Success
If sin260° + cos245° + cot245° + tan260° - x = 4 , find the value of x . |
\(\frac{1}{2}\) \(\frac{1}{4}\) \(\frac{4}{5}\) \(\frac{5}{4}\) |
\(\frac{5}{4}\) |
⇒ sin260° + cos245° + cot245° + tan260° - x = 4 ⇒ (\(\frac{√3}{2}\))2 + (\(\frac{1}{√2}\))2 + 1 + (\(\sqrt {3}\))2 - x = 4 ⇒ \(\frac{3}{4}\) + \(\frac{1}{2}\) + 1 + 3 - x = 4 ⇒ \(\frac{3 + 2 + 4 + 12 - 4x}{4}\) = 4 ⇒ 21 - 4x = 16 ⇒`4x = 5 ⇒ x = \(\frac{5}{4}\) |