Example 12 - Prove that (sin - cos θ + 1)/(sin + cos - 1)

Example 23 - If A = [cos sin -sin cos], prove An - Class 12

f x = a cos theta -b sin theta and y = a sin theta + b cos theta

Summary of trigonometric identities

Prove that ` (cos theta)/((1-tan theta))+(sin theta)/((1-cot theta))=(cos theta+sin theta). `

Prove that 1/(sin θ + cos θ) + 1/(sin θ - cos θ) = 2 sin θ/(1 – 2

sin(90-x)=cos(x) - Trigonometry

Show that sin^-1 (2x √(1-x^2)) = 2 cos^-1 x - Inverse Trigonometry

Proof of the double-angle and half-angle formulas. Trigonometry

sin theta - cos theta + 1 ) ( sin theta + cos theta - 1 = frac