(1+tan^2theeta )*sin ^2 ttheeta
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answer:
tan²theeta
explaination:
- (1+tan²theeta)sin²theeta
- (1+sin²theeta/cos²theeta)sin²theeta
- (cos²theeta+sin²theeta/cos²theeta)sin²theeta
- (1/cos²theeta)sin²theeta
- sin²theeta/cos²theeta
- tan²theeta
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