Use a calculator to approximate each value in decimal degrees.

θ = arcsec 3.4723155

Evaluate each expression without using a calculator.

cos (arccos (-1))

Evaluate each expression without using a calculator.

arccos (cos (3π/4))

Evaluate each expression without using a calculator.

tan⁻¹ (tan (π/4))

Evaluate each expression without using a calculator.

cos (csc⁻¹ (-2))

Evaluate each expression without using a calculator.

tan (arcsin (3/5) + arccos (5/7))

Write each trigonometric expression as an algebraic expression in u, for u > 0.

tan (arcsec (√1―u²) / u)

Find the exact value of each real number y. Do not use a calculator.

y = sin⁻¹ √2/2