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RD Chapter 5- Trigonometric Ratios Ex-5.2 Interview Questions Answers

Question 1 : Evaluate each of the following (1-19) :
sin45° sin30° + cos45° cos30°.

Answer 1 : sin 45° sin 30° + cos 45° cos 30°

Question 2 : sin60° cos30° + cos60° sin30°.

Answer 2 :


Question 3 : cos60° cos45° – sin60° sin45°.

Answer 3 :


Question 4 : sin230° + sin245° + sin260°+ sin290°.

Answer 4 :


Question 5 : cos230° + cos245° + cos260°+ cos290°.

Answer 5 :


Question 6 : tan230° + tan260° + tan245°.

Answer 6 :


Question 7 : 2sin230° – 3cos245° + tan260°.

Answer 7 :


Question 8 : sin230°cos24S° + 4tan230°+ (1/2) sin290° -2cos290°+ (1/24) cos20°.

Answer 8 :


Question 9 : 4 (sin4 60° + cos4 30°)– 3 (tan2 60° – tan2 45°) + 5cos2 45°

Answer 9 :


Question 10 : (cosecc2 45° sec2 30°)(sin2 30° + 4cot2 45° – sec2 60°).

Answer 10 :



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