Evaluate each expression without using a calculator, and write your answers in radians.       cos (1/2)

Q: -84º is equivalent to how many radians?

A: The measure of its degrees to the radians, You need to multiply the value by π/180°.   Angle in…

Q: Cos 30 degrees

A:

Q: State the period, the amplitude, the phase shift, the vertical shift, any reflections, domain, and…

A: For a function y = d + a sin b(x - c), Period = 2π/|b|. Amplitude = |a| Phase shift(horizontal) = c…

Q: Rewrite sin55° in terms of the appropriate cofunction.

A: Consider  sin(55°)

Q: Cos 60

A: See attached file for a step by step explanation to find the trigonometric value.

Trigonometric Identities

Trigonometry in mathematics deals with the right-angled triangle’s angles and sides. By trigonometric identities, we mean the identities we use whenever we need to express the various trigonometric functions in terms of an equation.

Inverse Trigonometric Functions

Inverse trigonometric functions are the inverse of normal trigonometric functions. Alternatively denoted as cyclometric or arcus functions, these inverse trigonometric functions exist to counter the basic trigonometric functions, such as sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (cosec). When trigonometric ratios are calculated, the angular values can be calculated with the help of the inverse trigonometric functions.