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Sum and difference identities Quiz: printable

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Sum and difference identities Quiz

Name: ______________________ Date: __________ Score: ____ / 10

10 questions. Calculator allowed. Show your working. steplyclass.com/trigonometry/sum-and-difference-identities/quiz/

1
Exact value of sin 75°
Answer: ____________________
2
Exact value of sin 15°
Answer: ____________________
3
Exact value of sin 105°
Answer: ____________________
4
Exact value of sin(45° + 30°)
Answer: ____________________
5
Exact value of cos 165°
Answer: ____________________
6
Exact value of cos 255°
Answer: ____________________
7
Exact value of cos 345°
Answer: ____________________
8
Exact value of sin 7π/12
Answer: ____________________
9
Calculate sin 50° cos 10° + cos 50° sin 10°
Answer: ____________________
10
Calculate sin 100° cos 55° − cos 100° sin 55°
Answer: ____________________

Answer key

(√6 + √2)/4
(√6 − √2)/4
(√6 + √2)/4
(√6 + √2)/4
(−√6 − √2)/4
(√2 − √6)/4
(√6 + √2)/4
(√6 + √2)/4
√32
√22

Every answer solved step by step: steplyclass.com/trigonometry/sum-and-difference-identities/quiz/answers/