Question

solve this question

Answer 1

We have,
                     L.H.S. = (sinA+cosecA)2+(cosA+secA)2
                     = (sin2A+cosec2A+2sinAcosecA)+(cos2A+sec2A+2cosAsecA)
                      = (sin2A+cosec2A+2sinA.1sinA)+(cos2A+sec2A+2cosA.1cosA)
                      = (sin2A+cosec2A+2)+(cos2A+sec2A+2)
                      = sin2A+cos2A+cosec2A+sec2A+4 [Since,sin2A+cos2A=1]
                      = 1+(1+cot2A)+(1+tan2A)+4
                      = 7+tan2A+cot2A


hope its helpful to you

Answer 2

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How to Prepare for Class 10 Board Exams

You will be appearing for your 10th board exams this year. Till now you have been competing with classmates but now for the first time you will be exposed to greater competition, with numerous students across the country appearing for exam. This will be your first step towards achieving the goal you have set in life. This is because the 10th board marks will be a decisive factor for most of your future endeavours.

Tips to prepare 

Know the syllabus clearly: Follow your class lessons properly to cover your syllabus in a systematic manner. The class lessons are probably the first introduction of the topics to you. After coming home, revise whatever is taught in the class, as the topics will be still fresh in mind. In case of confusion, clarify with your teacher the next day.

Solve questions: Try and solve the questions at the end of each topic and also the last ten years' papers. If you are stuck, make sure you have it resolved by the next day at the maximum. Take help from teachers and seniors, as needed.

Maintain separate notebooks for each subject: Jot down important notes and formulae that you come across during your studies. This will help before the exams as you can just grab the subject notebook and revise the portions you want.

Highlight important points: Highlight important points and formulae on textbooks and reference books to locate them easily. Revise the points as and when you get time.

Plan your studies: Chalk out a time table for board exam preparation and allocate ample time for each subject. Choose the time that you think is best for study. It can be early in the morning or late at night. Do not allow distractions to mar your studies. Select a study space that you feel is most suitable and convenient.

Know your strengths and weaknesses: Hone your strengths but do not ignore your weaknesses. Concentrate more to improve on them. Take guidance from your teachers.

Revise Well: Do not study anything new or from a new book right before exams, as you may get confused. Revise what you have studied and glance at important notes and formulae. Make note of important formulae and keep them handy so that you can take a look at them as an when you want. Make a weekly revision plan once you have completed the entire syllabus.

Keep fit: Eat healthy and take ample rest. Make sure you are also spending some time playing and re-energizing yourself.