Use the exact value of cos (11π/6) and the half-angle identity for sine to show that an exact value of sin (11π/12) is given by √2−√3 /  2. (The square root before the 2 extends over the top of the whole numerator)

Q: Find sin π/4, cos π/4, and tan π/4.

A:

Q: Use a sketch to find the exact value of the expression sin (cos-1√2/ 2)

A: sincos-122

Q: From the formula of sin (A + B), deduce the formulae of cos(A+ B) and cos (A- B).

A: To derive formula cos(A+B) & cos(A-B) using formula of sin(A+B)

Q: cos 12 cos 12 + sin 12 IT sin 12 cos

A:

Q: ind cose, given that sin0 = -5/13 and 0 s in quadrant III. %3D elect one: a. -12/13 b. -5/12 C. 12/5…

A: Answer is- Option a is correct Explanation is given below...

Q: 2. Give the exact value of the principle root in radians of "simplify the radical 3+ 2/2 sin 0 = 5.

A: Given,