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CBSE Class 10 Answered

Sin2theta×sin2phi+sin2theta×cos2phi+cos2theta×sin2phi+cos2theta×cos2phi+3cosec4theta-3cot4theta-6cot2theta
Asked by Chelsea Dhawan | 11 Oct, 2014, 07:46: PM
answered-by-expert Expert Answer
sin squared theta. sin squared phi plus sin squared theta. cos squared phi plus cos squared theta. sin squared phi plus cos squared theta. cos squared phi plus 3 cos e c to the power of 4 theta minus 3 c o t to the power of 4 theta minus 6 c o t squared theta equals sin squared theta left parenthesis sin squared phi plus cos squared phi right parenthesis space plus space c os squared theta left parenthesis sin squared phi plus space cos squared phi right parenthesis plus 3 cos e c to the power of 4 theta minus 3 c o t to the power of 4 theta minus 6 c o t squared theta equals sin squared theta plus space c os squared theta plus 3 left parenthesis cos e c squared theta minus c o t squared theta right parenthesis left parenthesis cos e c squared theta plus c o t squared theta right parenthesis minus 6 c o t squared theta equals sin squared theta plus space c os squared theta plus 3 cross times 1 cross times left parenthesis cos e c squared theta plus c o t squared theta right parenthesis minus 6 c o t squared theta equals 1 plus 3 cos e c squared theta plus 3 c o t squared theta minus 6 c o t squared theta equals 1 plus 3 cos e c squared theta minus 3 c o t squared theta equals 1 plus 3 left parenthesis cos e c squared theta minus c o t squared theta right parenthesis equals 1 plus 3 cross times 1 equals 4
Answered by Prasenjit Paul | 13 Oct, 2014, 11:02: AM

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