2017年11月14日 · In this case, 105, can be split into 45+60 (cos (45+60)) Use the sum formula for cosine to simplify the expression. The formula states that cos (A+B) = - (cos (A) cos (B) + sin (A) sin (B)). The exact value of cos(60) is 1/2. So multiply 1/2 to cos (45) - sin (60) times sin (45). The exact value of cos (45) is the square root of 2 over 2

The given expression 2 sin 105° cos 105° can be written as sin(210°) using the double angle identity for sine, and the exact value of sin(210°) is -1/2. Explanation: To express the expression 2 sin 105° cos 105° as the sine, cosine, or tangent of a double angle, we can use the identity for sin(2θ) = 2 sin(θ) cos(θ).

2023年1月23日 · The** exact** value of cos 105 degrees is (√3-1) / 2√2 . What is Trigonometric Function ? Trigonometric functions also are referred to as circular features can be really described as the capabilities of an angle of a triangle.

2024年12月31日 · Write the given expression as the sine of an angle. sin 105ºcos 35° + sin 35° cos 105° a. sin(-70) b. sin(140) (350) d. sin(70) e. sin(105°) Community Answer Find the exact value of sin 105°, cos 105° using the fact that 105°=135° - 30°

cos 105° = Type an exact answer, using radicals as needed. Use integers or fractions for any n Use the Half-angle Formulas to find the exact value of the expression sin 12 12 (Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the 2[글 cos-1(- )] Find the exact value of sin 12 2 2 13 (Type an exact ...

2025年2月15日 · Write the following expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2 sin 105° cos 105° Write the following expression as the sine, cosine, or tangent of a double angle. Select the correct choice below and fill in the answer box to complete your choice. O (Simplify your answer.

2025年3月20日 · Write the following expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2 sin 105° cos 105° Write the following expression as the sine, cosine, or tangent of a double angle. Select the correct choice below and fill in the answer box to complete your choice. O (Simplify your answer.

2024年12月19日 · To find the values of cos 10 5 ∘ and csc 10 5 ∘, we can use properties of trigonometric functions based on the given values for cos − 10 5 ∘ and csc − 10 5 ∘. Cosine Function (Even Function): The cosine function is an even function, which tells us that: cos (− θ) = cos (θ) Therefore, we can write: cos 10 5 ∘ = cos (− 10 5 ...

Find the exact value of COS 105 Degrees using the half angle formula. Your solution’s ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on.

2019年12月7日 · Again, given that **csc (- 105°) = - 1.03 {{The negative sign is due to the angle - 105° lies in the third quadrant where csc value is negative} ** Now, cos (105°) = - 2.6, because 105° lies in the second quadrant and here cos value is negative. And** csc (105°) = 1.03, because 105° lies in the second quadrant and here csc value is positive.