1) prove that -
cos^2A-tan^2(90-A)=sin^2A+sin^2(90-A)
2) Write whether every positive integer can be of the form 4q + 2, where q is an integer. Justify your answer.
3) prove that - 
A+B+B+B+80+90=100
 

Asked by Rajeev | 6th Sep, 2014, 08:29: PM

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Answered by Mili Hariyani | 7th Sep, 2014, 02:44: PM