Calculate. cos 19° cos 68° cos 28° cos 56° cos 38° + 2 sin 28° sin 19° sin 30° 4 sin 28° sin 19°

Q: 10 Type the correct answer in each box. If cos -105° = -0.26 and csC -105° = -1.03, then cos 105° =…

A: Given:- if cos-105° = -0.26 csc-105° = -1.03 To find:- cos(105°) and csc(105°)

Q: Determine whether the statement is true or false. Justify your answer.  a. cot220° - csc220° = -1…

A:

Q: 0 12 cos 90°

A: 1) cos90 2)tan135

Q: 9. 6 8. sec 43° = CSc 1. Siln 10º = cos = sin 58° B 7. cot 24° 24° 2. Tan= 10. csc 49° = sec = = cot…

A: Using trigonometry function

Q: 8 cos 10° cos 50° cos 70°

A: cos10°cos50°cos70°=√3/8Explanation:Step 1: Step 2: Step 3: Step 4:

Q: 28° 23.8 21 X 7.5° 56°

A: Given that, As we know, the sum of the three angles of a triangle is 180 degrees. As we know, in a…

Q: -135° sin e = cos 8 = tan =

A:

Q: Drag the tiles to the correct boxes to complete the pairs. Match the expressions with their…

A: Using multiple angle formula.

Q: Find the exact value of each expression: π TU 4. 2csc-seccos 4 3 6 6. sin(-270°) + cos 450° 5.…

A: 4) Given 2cosecπ4-secπ3cosπ6We know that…

Q: If cos75° = cos(30° + 45°), what expression shown is equivalent to cos75°? O A. 6+2 4 O B. 2+ 6 4 O…

A: Using compound angle formula.

Q: Suppose cos 2A = and 2A is an angle in the Third Quadrant. | 7' Then cos A

A: The trigonometric identity for cosine is cos 2x=2cos2 x−1.

Q: 17. When the angle of elevation to the Sun is 69', a tower casts a shadow on the ground that is 64.3…

A: We use Trigonometry ratios

Q: cos 18° cos 12° cos 72° cos 78° sin 62° sin 73° - sin 28° sin 17° -

A: On Simplifying we get   6​/2                                         Explanation: