Sederhanakanlah
a. sin 45° + cos 135°
b.(tan 45°)^2 + 8 (cos60°)^2
c. cot^2 45° cos 30° tan^2 60° cot^2 30°
d. (cos 150° + sin150°)^2
....
tolong dibantuyah
a. sin 45° + cos 135°
b.(tan 45°)^2 + 8 (cos60°)^2
c. cot^2 45° cos 30° tan^2 60° cot^2 30°
d. (cos 150° + sin150°)^2
....
tolong dibantuyah
b. 1^2 + 8(1/2)^2= 1 + 8/4 =1+2=3
c. 1^2 x 1/2 √3 x (√3)^2 x (√3)^2 = 1+1/2 √3 +3+3=7+1/2 √3
d. (-1/2 √3 + 1/2)^2 = 3/2 + 1/4 - 1/2 √3 = 9/4 - 1/2 √3
e. [(√3)^2 - (1/2 √3) ^2] (1/3 √3)^2 = (3-3/4)1/3 = 3/4
f.