#010 Simplifying Trig Expressions

Why can't subtraction be performed?

• Trig function values cannot be subtracted.

• There are no like terms.

• The answer would be negative.

The first step for this problem is

• Convert everything to sines and cosines using trig identities

• Find an identity that is similar

• Subtract the two expressions

• Give up.

• Exponential identity
• Trigonometric identity
• Pythagorean identity
• Logarithmic identity

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