Trigonometric Identities

Trigonometric Identities Reciprocal Identities

Trigonometric Identities Quotient Identities

Trigonometric Identities Pythagorean Identities Note: sin2 is (sin )2 not sin (2)

Example 5 Use trigonometric identities to transform one side of the equation into the other. cossec=1 (sec+tan)(sec-tan)=1

Homework Practice  

Surveying A surveyor is standing 50 ft from the base of a large tree. The surveyor measures the angle of elevation to the top of the tree as 71.5°. How tall is the tree?

River Walk You are 200 yards from a river. Rather than walking directly to the river, you walk 400 yards along a straight path to the river’s edge. Find the acute angle ө between this path and the river’s edge.

Skateboarding Find the length c of the skateboard ramp.