If sin A and cos A are the roots of the equation ax^2 - bx + c = 0, then a, b and c satisfy the equation: (A) b^2 - a^2 = 2ac, (B) a^2 - b^2 = 2ac, (C) a^2 + b^2 = c^2 ,(D) a^2 + b^2 = 2ac

A: 
The algebra is tedious, but manageable. Use the pythagorean trig identity for sine and cosine set equal to the squares of the 2 roots written in quadratic equation form. Expand and simplify.

If a=23.5, A=62 degrees and b=c, find R and r

show that r1 r2 + r2 r3 + r3 r1 = s^2

If a=13, b=14, c=15 find r1, r2, r3

Solve the trigonometric equation

Solve the triangle: B=86 deg, C=17 deg, 42 min, and b=23

Solve the triangle

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System of trigonometric equations

Solve the system of trigonometric equations

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Solving Trigonometric Equations

Solution:
These types of trig equations can be solved by working with the inputs to the individual trig functions:

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