1. Which of the following is equal to cos 35 A) sin 35° B) cos S5 D) cos 145 2.

Question

1. Which of the following is equal to cos 35 A) sin 35° B) cos S5 D) cos 145 2. Which of the following is equal to sin 8° A) sin 82° 8) cos 8° C) cos 82° D) sin 98 3. Which of the following statements is false? A) sin 45° cos 45 B) sin 30° cos 30° Ccos 10° sin 80 D) sin 09 4. Given the ratio , which of the following is NOT equal to this value? 13 13 cm AC A) sin 2B B) cos LC C) D) sin ZC BC 5. If cos ? sin ? then which of the following must be true? C)B-90-e D)8-0-90° 6. Solve the following a) sin 27 - Cos d) cos 90° sin b)cos 55° sin c) sin 17.8°-cos- e) cos 45sin_ f) sin 62 cos 7. Solve for the unknown. a) sin (2x+1°)- cos (220) b) sin (5x+15°)- cos (4x-6) c) sin (2x)-cos( d) sin (x) -cosx+12) e) sin (7x +15°) cos (3x+40)+ 2)-cos(53°) 8. Explain WHY sin 20°-0.342 and the cos 70°-0.342

Explanation / Answer

1) cos 35 = sin ( 90 - 35 )

cos 35 = sin 55

2) sin 8 = cos ( 90 - 8 )

sin 8 = cos 82

3) sin 30 = cos 30 is false statement

option b is correct

4) sin C is not equal to 12/13

option d is correct

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