Book: NCERT - Mathematics
Chapter: 8. Introduction to Trigonometry
Subject: Maths - Class 10th
Q. No. 1 of Exercise 8.2
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1
Evaluate the following:
(i) 
(ii) 
(iii) 
(iv) 
(v) 
(i) sin60° cos30° + sin30° cos 60°
= (
(
+ (
(
= 
= 1
(ii) 2tan245° + cos230° - sin260°
= 2 (1)2 + (
2 - (
2
= 2 + 
– 
= 2
(iii) 
= 
= 
= 
= 
= 
= 
(iv) 
= 
= 
= 
= 
= 
= 
= 
(v) 
= 
= 
3
