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CBSE Class 12-science Answered

prove 1+(2tan^2theta)/cos^2theta=tan^4theta+sec^4theta
Asked by kumarkundanekghara | 20 Jul, 2015, 07:51: PM
answered-by-expert Expert Answer
C o n s i d e r space t h e space g i v e n space e x p r e s s i o n colon L H S equals fraction numerator 1 plus 2 tan squared theta over denominator cos squared theta end fraction space space space space space space space equals fraction numerator 1 plus t a n squared theta plus t a n squared theta over denominator c o s squared theta end fraction space space space space space space space equals fraction numerator open parentheses 1 plus tan squared theta close parentheses plus t a n squared theta over denominator c o s squared theta end fraction space space space space space space space equals fraction numerator s e c squared theta plus t a n squared theta over denominator c o s squared theta end fraction space space space space space space space equals fraction numerator 1 over denominator cos squared theta end fraction open parentheses s e c squared theta plus tan squared theta close parentheses space space space space space space space equals s e c squared theta open parentheses s e c squared theta plus t a n squared theta close parentheses space space space space space space space equals s e c to the power of 4 theta plus s e c squared theta cross times t a n squared theta P l e a s e space c h e c k space y o u r space q u e s t i o n.
Answered by Vimala Ramamurthy | 21 Jul, 2015, 10:28: AM

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