![Evaluate the following : - Cos square 20 degree + cos square 70 degree by sin square 57 degree + - Math - Introduction to Trigonometry - 12992581 | Meritnation.com Evaluate the following : - Cos square 20 degree + cos square 70 degree by sin square 57 degree + - Math - Introduction to Trigonometry - 12992581 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_b4fdf950911902e6ead1c567bfb98c38.png)
Evaluate the following : - Cos square 20 degree + cos square 70 degree by sin square 57 degree + - Math - Introduction to Trigonometry - 12992581 | Meritnation.com
C c B b A a sin sin sin = = A bc Area sin 2 1 = ° = −− = == = = 101 46 33 180 3.5 )33 sin( )46 sin(4 33sin 46sin4 46sin 33s
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