SPED ber: lon: Name: Date: Trigonometric Identities Practice Worksheet 1 Use the quotient and reciprocal identities to simplify the given expression. 1. cott sin t 3. csc t sin t 2. tan t cott 4. cott sec t Use the Pythagorean identities to simplify the given expression. csc t - cott 5. sin t + cot t sin t 7. sin t 6. 1 - sect 8. S sin 't - cost sin 2 t sin ' t For the following exercises, sin t = 3/5. Use the cofunction identities and the even/odd identities to evaluate each trigonometric function. 9. sin (-t) 1 1. sin 10. sin 12. tan (-t) Use the fundamental identities and algebra to simplify the expression. 13. (sin t + cos t)(sin t - cost) 16 Cost + 4 cost + 4 sin t cost + 2 14. tan t 17. sin t tan t 15 4 cos't sin t 2 cost sin ' t 4costgl stude un pon 3'd period Math IV Use trigonometric identities to prove that the following is always true: ing B. ) tan x+secx = sin x + 1 cos x 5th period Math IV Use trigonometric identities to prove that the following is always true: D.) sin*x - cos*x = 2sin2x - 1 7th period Math IV Use trigonometric identities to prove that the following is always true: E.) sin'x + tan'x + cos2x = sec2x