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AP EAMCET · Maths · Trigonometric Ratios & Identities

Which of the following trigonometric values are negative?
\(\begin{aligned} & \text { I. } \sin \left(-292^{\circ}\right) \\ & \text { II. } \tan \left(-190^{\circ}\right) \\ & \text { III. } \cos \left(-207^{\circ}\right) \\ & \text { IV. } \cot \left(-222^{\circ}\right)\end{aligned}\)

  1. A II, III and IV
  2. B Only III
  3. C I and III
  4. D II and III
Verified Solution

Answer & Solution

Correct Answer

(D) II and III

Step-by-step Solution

Detailed explanation

For option I, \(\sin \left(-292^{\circ}\right)=-\sin 292^{\circ}\) \(\begin{aligned} & =-\sin \left(360^{\circ}-68^{\circ}\right)=-\sin 68^{\circ} \\ & =-(-)=+ \text { ve value }\end{aligned}\) So, clearly \(\sin \left(-292^{\circ}\right)\) give + ve value. For option II,…