Use a half-angle formula to evaluate the expression without using a calculator. sin 12 e. Which half--angle formula should be used to evaluate the expression sin 12

Q: cot sin (Simplify your answer, including any radicals. Use integers or fractions for any numbers in…

A: To solve the following problem

Q: Find the exact value of expression sin 240°. Do not use a calculator.

A: Given: sin240∘ we know that  sin180∘+θ=-sinθ

Q: Use a calculator to evaluate each expression to the nearest tenth of a degree. sin-(-0.6271) -42.2°…

A:

Q: x/3  radians is equivalent to 60°. True   False

A: Given that x/3  radians is equivalent to 60°.

Q: Let sine 32 and <<x. Part A: Determine the exact value of cos 20. Part B: Determine the exact value…

A: NOTE: Refresh your page if you can't see any equations. . here we have and the given interval is…

Q: Use double- and half-angle formulas to find the exact value of the expression tan(π/12).

A:

Q: How do you decide whether to use a positive or negative sign in the half-angle formula for sine and…

A: Solving the following problem

Q: Find tan -75° without using a calculator. [?]-V] |

A:

Q: Without the use of a calculator, determine the value of: tan120°. sin300°. sin135° sin120°.cos225°

A: The answer is found in step-2.

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.