Q. 14.1( 436 Votes )

Evaluate the following:
(i)

(ii)

(iii)

(iv)

(v)

Answer :


 Given is the table of Trigonometrical ratios for different values. Use the values from table for solving the questions.


(i) sin60° cos30° + sin30° cos 60°



= 1


(ii) 2 tan245° + cos230° - sin260°


= 2 (1)2 + (√3/2)2 - (√3/2)2


= 2 + 3/4 - 3/4


= 2 


(iii)





As the denominator has an irrational number, we need to rationalize the fraction

(iv)



(v)

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