π cos(0) 13) Calculate: 3√1-sin 0 π 3 de

Q: Simplify 2sin(4x) cos(4x)

A:

Q: 2 Simplify completely: sec x (1 – sin² x). sec x CO X O None of these. O 1 sin x

A: we use Trigonometry identities

Q: Find x if cos 53°= sin x. %3D (1) 90° (2) 127° (3) 53° (4) 370

A: To find x, if cos53°=sin x

Q: Simplify  1/cos a 1/sin b

A: we know that  1cosθ=secθ1sinθ=cosecθ

Q: Let sinA=-4/5 with A in QIII and cosB=-3/5 with B in QII. Anwer Exactly. Find sin(A-B), cos(A-B),…

A: Given,

Q: prove that sin(45° + A) sin(45° - A) = 1/2cos2A

A:

Q: Find the angle between 0 and 2π equivalent to 13π /4.

A: The given angles are, 0,2π and 13π4.

Q: Derive the following formulas: cos 2x =1-2 sin² x

A: