Trigonometry Answers

Find an algebraic expression for sin[arccos(3x)]. PLEASE show the steps

(1+tan1)(1+tan2)................(1+tan45)?

Find the area of a triangle bounded by the lines y=x, y=-x, and y=6?

Given y=Acos(Bx+C) + D. Throughout the day the depth of water at the end of a pier varies with the tides. High tide occurs at 4 am with a depth of 6 meters. Low tide occurs at 10 am with a depth of 2 meters. Model the problem by using the given trigonometric equation to show the depth of the water t hours after midnight showing all your work.

Solve the problem by finding the depth of the water at noon, explaining, the reasoning.

cos(x)^(4)-sin(x)^(4)=2cos(x)^(2)-1

p=sinθ and q=4cotθ
show that p^(2)q^(2)=16(1-p^(2))

what is cos^2 - sin^2 = 1 - sin
and
9 + 9sin = 6cos^2

cosA/(1-tanA)+sinA/(1-cotA)=sinA+cosA

plz explain me all about Logarithms of complex Quantities .

how to solve this identity step by step:
cosx +1/ tan^2x = cosx/secx -1