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# You measure angle of elevation from ground to top of building as 32°. When move 50 m closer to building, angle of elevation is 53°. How high is building?

alegebra problem, involves sin, cos, tan, csc, sec, cot

# Radius 4cm.CB tangent to at A, C&B connects to O making triangle, area of shaded portion? angle O =45 degree

Options  1) 16 – π 2) 16 – 4π 3) 16 – 2π 4)(π/4) – 16

# may i have help?

complete the identity: sec (t)- cos (t)=?   1.) -2tan^2(t)   2.) sin(t) tan(t)   3.) sec (t) csc (t)   4.) 1+ cos (t)

# if cosa+sina=2cosathen prove cosa-sina=2sina

if cosa+sina=√2cosa then prove cosa-sina=√sina

# if you were to find the cos75°, which formulas could you use? Would you get the same answer using both methods? How would you know?

if you were to find the cos75°, which formulas could you use? Would you get the same answer using both methods? How would you know?   please explain

# what are the solutions to cos (30) = -1 in the interval (0,2radian)

what are the solutions to cos (30) = -1 in the interval (0,2radian).   Please I need step by step instructions on how the answer was found.    P.S also looking for a...

# if sin teta = -1/3 and teta does not lie in the quadrant 3 find the value of cos teta

FIND THE VALUE OF COS TETA

# Simplify : Tan^(-1) {a.cosx - b.sinx/ b.cosx + a.sinx} If x € (-p/2 , +p/2)

Simplify. Please i need help! p- stands for Pi (radians). and yeah, its like this (a.cosx - b.sinx) / (b.cosx + a.sinx). Amd Tan^(-1) stands for the tangent inverse (tan inverse). We need...