কিভাবে ত্রিকোণমিতি শিখবে/ How to learn Trigonometric formula easily.

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learn voice change from tense

RULES FOR CHANGING VOICE FROM ACTIVE TO PASSIVE:-- step1:- Write all tenses (present,past,future) according to their order as Indefinite -- continuous -- perfect --                     perfect continuous. step2:- Always obey rule:- subject + be verb + verb's 3rd form + by/with + object + etc.  step3:- To change 'present indefinite', go to present continuous and take verbs like am/is/are as be verb,then                     follow step 2. step4:- To change present continuous, use be verb of this tense + being ,then follow step 2. step5:- To change present perfect,go to present perfect continuous and take verbs like have been or has been                   according to subject,then follow step 2.  step6:- No change is possible for present perfect continuous.             N.B:-- (1)For past and futu...
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About an unnatural scene

  Topic on Natural scene which is unnatural:- It was 1995,the month is not in my mind.But the scene is still in my memory.It was actually a Solar eclipse with 'corona'.This type of Solar eclipse is rare.A 'silver ring' was seen which was observed so nicely that it cannot be explained in language.   Besides this,when the day was turned into evening,the birds were returning back to their nest thinking it was time to return home.But a few seconds,when day was again seen,they again went to the opposite direction.Another thing was beautifully observed that the shadow of the trees were many.Because scientifically when the Earth comes in between Sun & Moon,the Solar eclipse occurs & as the Moon is smaller in size than the Earth & the distance between them is larger,the small part of the Earth is under the 'umbra' (dark shadow position).Hence the observers of that portion of the Earth watch the glowing of the Sun-rays as 'silver ring'.I...
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