Trigonometry Worksheet
Sine law vs. Cosine Law
*Answers are below
a) Triangle ABC – 42 degrees in angle A, 57 degrees in angle C, side a = 15cm. What is the length of side AB?
b) Triangle RST – 39 degrees in angle T, side t = 27mm, side r = 36mm. What is the value of angle R?
c) Triangle HIJ – side j = 19m, side h = 21m, side i = 32m. What is the value of angle H?
d) Triangle ABC – 69 degrees in angle C, 33 degrees in angle B, side c = 26cm. What is the length of side b?
e) Triangle RST – 57 degrees in angle S, side r = 35m, side t = 30m. What is the length of side s?
f) Triangle EFG – 58 degrees in angle E, 50 degrees in angle G, side g = 16mm. What is the length of side f?
g) Triangle QRS – side q = 21cm, side s = 16cm, side R = 24cm. What is the value of angle S?
h) Triangle ABC – 47 degrees in angle B, side b = 10m, side c = 13m. What is the value of angle C?
Answers:
a) 18.8 cm
b) 57 degrees
c) 39 degrees
d) 15.2 cm
e) 31.3 m
f) 19.9 mm
g) 41 degrees
h) 72 degrees
Sine law vs. Cosine Law
*Answers are below
a) Triangle ABC – 42 degrees in angle A, 57 degrees in angle C, side a = 15cm. What is the length of side AB?
b) Triangle RST – 39 degrees in angle T, side t = 27mm, side r = 36mm. What is the value of angle R?
c) Triangle HIJ – side j = 19m, side h = 21m, side i = 32m. What is the value of angle H?
d) Triangle ABC – 69 degrees in angle C, 33 degrees in angle B, side c = 26cm. What is the length of side b?
e) Triangle RST – 57 degrees in angle S, side r = 35m, side t = 30m. What is the length of side s?
f) Triangle EFG – 58 degrees in angle E, 50 degrees in angle G, side g = 16mm. What is the length of side f?
g) Triangle QRS – side q = 21cm, side s = 16cm, side R = 24cm. What is the value of angle S?
h) Triangle ABC – 47 degrees in angle B, side b = 10m, side c = 13m. What is the value of angle C?
Answers:
a) 18.8 cm
b) 57 degrees
c) 39 degrees
d) 15.2 cm
e) 31.3 m
f) 19.9 mm
g) 41 degrees
h) 72 degrees