Find the exact value of the expression 1 - tan2 10° + csc2 80°. Do not use a calculator.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter9: Real Numbers And Right Triangles
Section9.8: The Sine And Cosine Ratios
Problem 16E
Question

Find the exact value of the expression 1 - tan2 10° + csc2 80°. Do not use a calculator.

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