Question

5. sin 30°- 2 cos 60° + 3 tant 45º = ?​

Answer 1

Step-by-step explanation:

sin30 = 1/2

cos60 = 1/2

tan45 = 1

so, sin30-2cos60+3tan45=

1/2-(2x1/2)+(3x1) = 5/2=2.5

Answer 2

Answer:

Step-by-step explanation: We know, Sin30 = 1/2 Then 5× sin30 = 5/2 Cos60 = 1/root2 Then 2× cos60 = 2/root2 and on rationalising 2/root2 we get 2 ×cos60 = root2 tan45 = 1 and hence 3× tan45 = 3

5sin30 - 2cos60 + 3tan45 = 5/2 - root2 + 5