Trigonometric ratios of an acute angle
Problems
, Trigonometric ratios of an acute angle
Problems :
1
2. If tan B= , B is an acute angle, find sin B and
2 A
cos B
√5
1
AC 1
From the figure tan B= =
BC 2 C B
2
2 2 2
By Pythagorus theorem AC + BC = AB
2 2 2 2
1 +2 = AB ⇒ AB =5 ⇒ AB= √ 5
Problems
, Trigonometric ratios of an acute angle
Problems :
1
2. If tan B= , B is an acute angle, find sin B and
2 A
cos B
√5
1
AC 1
From the figure tan B= =
BC 2 C B
2
2 2 2
By Pythagorus theorem AC + BC = AB
2 2 2 2
1 +2 = AB ⇒ AB =5 ⇒ AB= √ 5
